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<p>结构体排序忘了Orz</p>
<p>先排序 然后判断能否完整覆盖棋盘 之后呢在取最远的</p>
<p>话说训练赛又被虐的体无完肤了Orz</p>
<p>还有这题有坑Orz</p>
<p>13 45是可以的</p>
<p>喵喵喵？？？</p>
<figure class="highlight c++"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><iostream></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><algorithm></span></span></span><br><span class="line"><span class="keyword">using</span> <span class="keyword">namespace</span> <span class="built_in">std</span>;</span><br><span class="line"><span class="keyword">int</span> N,T;</span><br><span class="line"><span class="keyword">const</span> <span class="keyword">int</span> maxn=<span class="number">25010</span>;</span><br><span class="line"><span class="class"><span class="keyword">struct</span> <span class="title">node</span>{</span></span><br><span class="line"> <span class="keyword">int</span> s;</span><br><span class="line"> <span class="keyword">int</span> e;</span><br><span class="line">};</span><br><span class="line"><span class="function"><span class="keyword">bool</span> <span class="title">cmp</span><span class="params">(node a,node b)</span></span>{</span><br><span class="line"> <span class="keyword">return</span> a.s<b.s;</span><br><span class="line">}</span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">()</span> </span>{</span><br><span class="line"><span class="comment">// freopen("test","r",stdin);</span></span><br><span class="line"> <span class="keyword">while</span>(<span class="built_in">cin</span>>>N>>T) {</span><br><span class="line"> node n[maxn];</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>; i < N; i++)</span><br><span class="line"> <span class="built_in">cin</span> >> n[i].s >> n[i].e;</span><br><span class="line"> sort(n, n + N, cmp);</span><br><span class="line"> <span class="keyword">int</span> temp=<span class="number">0</span>,top=<span class="number">0</span>,ans=<span class="number">0</span>,i=<span class="number">0</span>;</span><br><span class="line"> <span class="keyword">while</span>(temp<T&&i<N){</span><br><span class="line"> ans++;</span><br><span class="line"> top=temp;</span><br><span class="line"> <span class="keyword">if</span>(n[i].s>temp+<span class="number">1</span>)</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> <span class="keyword">while</span>(n[i].s<=temp+<span class="number">1</span>&&i<N){</span><br><span class="line"> top=max(n[i].e,top);</span><br><span class="line"> i++;</span><br><span class="line"> }</span><br><span class="line"> temp=top;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span>(temp<T)</span><br><span class="line"> <span class="built_in">cout</span><<<span class="number">-1</span><<<span class="built_in">endl</span>;</span><br><span class="line"> <span class="keyword">else</span></span><br><span class="line"> <span class="built_in">cout</span><<ans<<<span class="built_in">endl</span>;</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>附讨论区不排序代码</p>
<p>其实相当于端点取最大值 省去了排序的必要 就是这样 喵～</p>
<figure class="highlight c++"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><iostream></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><cstdio></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><algorithm></span></span></span><br><span class="line"><span class="keyword">using</span> <span class="keyword">namespace</span> <span class="built_in">std</span>;</span><br><span class="line"><span class="keyword">int</span> N, T, M[<span class="number">1000050</span>];</span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">()</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> <span class="built_in">cin</span> >> N >> T;<span class="keyword">int</span> a, b;</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>; i < N; i++) { <span class="built_in">scanf</span>(<span class="string">"%d%d"</span>, &a, &b); <span class="keyword">if</span> (M[a] == <span class="number">0</span>)M[a] = b; <span class="keyword">else</span> M[a] = max(M[a], b); }</span><br><span class="line"> <span class="keyword">int</span> nows = <span class="number">1</span>, cnt = <span class="number">0</span>, t, pre = <span class="number">1</span>, i;</span><br><span class="line"> <span class="keyword">while</span> (nows - <span class="number">1</span> < T)</span><br><span class="line"> {</span><br><span class="line"> t = <span class="number">0</span>; i = pre;</span><br><span class="line"> <span class="keyword">for</span> ( ; i <= nows; i++)</span><br><span class="line"> <span class="keyword">if</span> (M[i] > t) { t = M[i]; pre = i; }</span><br><span class="line"> <span class="keyword">if</span> (t + <span class="number">1</span> == nows) { <span class="built_in">cout</span> << <span class="number">-1</span> << <span class="built_in">endl</span>; <span class="keyword">return</span> <span class="number">0</span>; }</span><br><span class="line"> nows = t + <span class="number">1</span>;cnt++;</span><br><span class="line"> }</span><br><span class="line"> <span class="built_in">cout</span> << cnt << <span class="built_in">endl</span>;</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>逆向思维一下 其实就是01234567到要求的字符串的距离</p>
<p>先打个表</p>
<p>输入方式倒是被卡住了一会ORZ</p>
<figure class="highlight c++"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><iostream></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><queue></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><string></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span><span class="meta-string"><map></span></span></span><br><span class="line"><span class="keyword">using</span> <span class="keyword">namespace</span> <span class="built_in">std</span>;</span><br><span class="line"><span class="built_in">queue</span><<span class="built_in">string</span>> q;</span><br><span class="line"><span class="comment">//string s;</span></span><br><span class="line"><span class="keyword">int</span> step[]={<span class="number">1</span>,<span class="number">-1</span>,<span class="number">4</span>,<span class="number">-4</span>};</span><br><span class="line"><span class="built_in">map</span><<span class="built_in">string</span>,<span class="keyword">int</span>> dp;</span><br><span class="line"><span class="function"><span class="keyword">void</span> <span class="title">bfs</span><span class="params">()</span></span>{</span><br><span class="line"> <span class="built_in">string</span> temp;</span><br><span class="line"> <span class="keyword">int</span> pos;</span><br><span class="line"> dp[<span class="string">"01234567"</span>]=<span class="number">0</span>;</span><br><span class="line"> q.push(<span class="string">"01234567"</span>);</span><br><span class="line"> <span class="keyword">while</span>(q.size()) {</span><br><span class="line"> temp=q.front();</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<temp.length();i++)</span><br><span class="line"> <span class="keyword">if</span>(temp[i]==<span class="string">'0'</span>)</span><br><span class="line"> pos = i;</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<<span class="number">4</span>;i++){</span><br><span class="line"> <span class="keyword">int</span> np=pos+step[i];</span><br><span class="line"> temp=q.front();</span><br><span class="line"> <span class="keyword">if</span>(np>=<span class="number">0</span>&&np<temp.length()&&!(pos==<span class="number">3</span>&&i==<span class="number">0</span>)&&!(pos==<span class="number">4</span>&&i==<span class="number">1</span>)){</span><br><span class="line"> <span class="keyword">char</span> ch=temp[np];</span><br><span class="line"> temp[np]=temp[pos];</span><br><span class="line"> temp[pos]=ch;</span><br><span class="line"> <span class="keyword">if</span>(dp[temp]==<span class="number">0</span>&&temp!=<span class="string">"01234567"</span>) {</span><br><span class="line"> q.push(temp);</span><br><span class="line"> dp[temp] = dp[q.front()] + <span class="number">1</span>;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> q.pop();</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> ;</span><br><span class="line">}</span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">()</span> </span>{</span><br><span class="line"> bfs();</span><br><span class="line"> <span class="keyword">int</span> in;</span><br><span class="line"> freopen(<span class="string">"in"</span>,<span class="string">"r"</span>,<span class="built_in">stdin</span>);</span><br><span class="line"> <span class="keyword">while</span> (<span class="number">1</span>) {</span><br><span class="line"> <span class="built_in">string</span> s;</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>;i<<span class="number">8</span>;i++) {</span><br><span class="line"> <span class="keyword">if</span> (!(<span class="built_in">cin</span> >> in)) <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">else</span></span><br><span class="line"> s+=in+<span class="string">'0'</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="comment">//cout<<s<<endl;</span></span><br><span class="line"> <span class="built_in">cout</span><<dp[s]<<<span class="built_in">endl</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>由于数据量很水 就用bfs简单搜索和set存就好了</p>
<p>今晚莫名其妙的失眠了Orz </p>
<p>可能是在想学姐吧 学姐可真好啊</p>
<p>刷题</p>
<figure class="highlight c++"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><iostream></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span><span class="meta-string"><set></span></span></span><br><span class="line"><span class="keyword">using</span> <span class="keyword">namespace</span> <span class="built_in">std</span>;</span><br><span class="line"><span class="keyword">int</span> <span class="built_in">map</span>[<span class="number">6</span>][<span class="number">6</span>];</span><br><span class="line"><span class="built_in">set</span><<span class="keyword">int</span>> S;</span><br><span class="line"><span class="keyword">int</span> step[][<span class="number">2</span>]={{<span class="number">-1</span>,<span class="number">0</span>},{<span class="number">1</span>,<span class="number">0</span>},{<span class="number">0</span>,<span class="number">-1</span>},{<span class="number">0</span>,<span class="number">1</span>}};</span><br><span class="line"><span class="function"><span class="keyword">void</span> <span class="title">dfs</span><span class="params">(<span class="keyword">int</span> x,<span class="keyword">int</span> y,<span class="keyword">int</span> k,<span class="keyword">int</span> sum)</span></span>{</span><br><span class="line"> <span class="keyword">if</span>(<span class="number">6</span>==k){</span><br><span class="line"> S.insert(sum);</span><br><span class="line"> <span class="keyword">return</span> ;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<<span class="number">4</span>;i++){</span><br><span class="line"> <span class="keyword">int</span> nx=x+step[i][<span class="number">0</span>],ny=y+step[i][<span class="number">1</span>];</span><br><span class="line"> <span class="keyword">if</span>(nx>=<span class="number">0</span>&&nx<<span class="number">5</span>&&ny>=<span class="number">0</span>&&ny<<span class="number">5</span>)</span><br><span class="line"> dfs(nx,ny,k+<span class="number">1</span>,sum*<span class="number">10</span>+<span class="built_in">map</span>[nx][ny]);</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">()</span> </span>{</span><br><span class="line"> <span class="comment">//freopen("test","r",stdin);</span></span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<<span class="number">5</span>;i++)</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> j=<span class="number">0</span>;j<<span class="number">5</span>;j++)</span><br><span class="line"> <span class="built_in">cin</span>>><span class="built_in">map</span>[i][j];</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<<span class="number">5</span>;i++)</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> j=<span class="number">0</span>;j<<span class="number">5</span>;j++)</span><br><span class="line"> dfs(i,j,<span class="number">1</span>,<span class="built_in">map</span>[i][j]);</span><br><span class="line"> <span class="built_in">cout</span><<S.size()<<<span class="built_in">endl</span>;</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>首先发现各个项的系数是二项式公式展开式</p>
<p>（其实就是杨辉三角Orz 初中学的都忘了</p>
<p>然后暴力枚举就好了 </p>
<figure class="highlight c++"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><iostream></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><algorithm></span></span></span><br><span class="line"><span class="keyword">using</span> <span class="keyword">namespace</span> <span class="built_in">std</span>;</span><br><span class="line"><span class="keyword">int</span> digit[<span class="number">11</span>];</span><br><span class="line"><span class="keyword">int</span> N,sum;</span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">comb</span><span class="params">(<span class="keyword">int</span> k,<span class="keyword">int</span> n)</span></span>{</span><br><span class="line"> <span class="keyword">if</span>(k==<span class="number">0</span>||k==n)</span><br><span class="line"> <span class="keyword">return</span> <span class="number">1</span>;</span><br><span class="line"> <span class="keyword">else</span></span><br><span class="line"> {</span><br><span class="line"> <span class="keyword">int</span> num=<span class="number">1</span>;</span><br><span class="line"> <span class="keyword">int</span> deno=<span class="number">1</span>;</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">2</span>;i<=k;i++){</span><br><span class="line"> num*=i;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=n;i>n-k;i--){</span><br><span class="line"> deno*=i;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> deno/num;</span><br><span class="line"> }</span><br><span class="line">}</span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">()</span> </span>{</span><br><span class="line"> <span class="keyword">while</span>(<span class="built_in">cin</span>>>N>>sum){</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<N;i++)</span><br><span class="line"> digit[i]=i+<span class="number">1</span>;</span><br><span class="line"> <span class="keyword">bool</span> flag=<span class="literal">true</span>;</span><br><span class="line"> <span class="keyword">while</span>(flag){</span><br><span class="line"> <span class="keyword">int</span> ans=<span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<N;i++)</span><br><span class="line"> ans+=comb(i,N<span class="number">-1</span>)*digit[i];</span><br><span class="line"> <span class="keyword">if</span>(ans==sum){</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<N;i++) {</span><br><span class="line"> <span class="keyword">if</span>(i!=N<span class="number">-1</span>)</span><br><span class="line"> <span class="built_in">cout</span> << digit[i] << <span class="string">' '</span>;</span><br><span class="line"> <span class="keyword">else</span></span><br><span class="line"> <span class="built_in">cout</span><<digit[i]<<<span class="built_in">endl</span>;</span><br><span class="line"> }</span><br><span class="line"> flag= <span class="literal">false</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">else</span></span><br><span class="line"> next_permutation(digit,digit+N);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>用next_permutation生成全排列 然后进行暴力求解</p>
<p>本来是想用贪心做的 但是贪心实在是太麻烦了 情况要考虑太多</p>
<p>然后以后千万别用x-y类似的表达式 被自己坑了一上午orz</p>
<figure class="highlight c++"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><iostream></span></span></span><br><span class="line"><span class="meta">#<span class="meta-keyword">include</span><span class="meta-string"><algorithm></span></span></span><br><span class="line"><span class="keyword">using</span> <span class="keyword">namespace</span> <span class="built_in">std</span>;</span><br><span class="line"><span class="keyword">int</span> num[<span class="number">11</span>];</span><br><span class="line"><span class="keyword">bool</span> used[<span class="number">11</span>];</span><br><span class="line"><span class="keyword">int</span> dig;</span><br><span class="line"><span class="keyword">char</span> ch;</span><br><span class="line"><span class="keyword">int</span> idx;</span><br><span class="line"><span class="keyword">int</span> x1=<span class="number">0</span>,x2=<span class="number">0</span>;</span><br><span class="line"><span class="keyword">int</span> ans;</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">()</span> </span>{</span><br><span class="line"> <span class="keyword">int</span> T;</span><br><span class="line"> <span class="built_in">cin</span>>>T;</span><br><span class="line"> <span class="keyword">while</span>(T--){</span><br><span class="line"> idx=<span class="number">0</span>;</span><br><span class="line"> ans=<span class="number">1000000</span>;</span><br><span class="line"> <span class="built_in">memset</span>(used, <span class="literal">false</span>, <span class="keyword">sizeof</span>(used));</span><br><span class="line"> <span class="keyword">while</span>(<span class="built_in">scanf</span>(<span class="string">"%d%c"</span>,&dig,&ch)==<span class="number">2</span>){</span><br><span class="line"> num[idx]=dig;</span><br><span class="line"> idx++;</span><br><span class="line"> <span class="keyword">if</span>(ch==<span class="string">'\n'</span>)</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">int</span> len=idx/<span class="number">2</span>;</span><br><span class="line"> <span class="keyword">do</span> {</span><br><span class="line"> <span class="keyword">if</span>(idx==<span class="number">2</span>){</span><br><span class="line"> ans=num[<span class="number">1</span>]-num[<span class="number">0</span>];</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span>(num[<span class="number">0</span>]==<span class="number">0</span>||num[len]==<span class="number">0</span>)</span><br><span class="line"> <span class="keyword">continue</span>;</span><br><span class="line"> x1=<span class="number">0</span>;</span><br><span class="line"> x2=<span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=<span class="number">0</span>;i<len;i++){</span><br><span class="line"> x1=<span class="number">10</span>*x1+num[i];</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">for</span>(<span class="keyword">int</span> i=len;i<idx;i++){</span><br><span class="line"> x2=<span class="number">10</span>*x2+num[i];</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span>(<span class="built_in">abs</span>(x1-x2)<ans)</span><br><span class="line"> ans=<span class="built_in">abs</span>(x1-x2);</span><br><span class="line"> }<span class="keyword">while</span>(next_permutation(num,num+idx));</span><br><span class="line"> <span class="built_in">cout</span><<ans<<<span class="built_in">endl</span>;</span><br><span class="line"></span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>