1076A. Minimizing the String.cpp

#define _CRT_SECURE_NO_WARNINGS

/***from dust i have come, dust i will be***/

#include<bits/stdc++.h>

typedef long long int ll;
typedef unsigned long long int ull;

#define dbg printf("in\n");
#define nl printf("\n");
#define N 1010
#define inf 1e18

#define sf(n) scanf("%d", &n)
#define sff(n,m) scanf("%d%d",&n,&m)
#define sfl(n) scanf("%I64d", &n)
#define sffl(n,m) scanf("%I64d%I64d",&n,&m)

#define pf(n) printf("%d",n)
#define pff(n,m) printf("%d %d",n,m)
#define pffl(n,m) printf("%I64d %I64d",n,m)
#define pfl(n) printf("%I64d",n)
#define pfs(s) printf("%s",s)

#define pb push_back
#define pp pair<int,int>

using namespace std;

int main()
{
    freopen("in.txt", "r", stdin);

    int i,j,k;
    int m,n;
    string s;

    cin>>n;
    cin>>s;

    k=0;
    for(i=0; i<n-1; i++)
    {
        if(s[i]>s[i+1])
        {
            s[i]='#';
            k=1;
            break;
        }
    }

    if(!k)
    {
        for(i=0;i<n-1;i++)
            cout<<s[i];
    }

    else
    {
        for(i=0;i<n;i++)
        {
            if(s[i]!='#'){cout<<s[i];}
        }
    }


    return 0;
}