added 348

euler/src/com/ferhatelmas/euler/page7/Question348.java

@@ -0,0 +1,43 @@
+package com.ferhatelmas.euler.page7;
+
+public class Question348 {
+
+  public static void main(String[] args) {
+
+    int sum = 0;
+    int lim, count = 0, len = 7;
+    while(true) {
+
+      lim = (int)Math.pow(10, len / 2 + (len % 2));
+
+      for(int i=lim/10; i<lim; i++) {
+        int palindrome = Integer.parseInt(String.valueOf(i) +
+            new StringBuilder().append(i).reverse().substring(len%2 == 0 ? 0 : 1));
+
+        if(isWanted(palindrome)) {
+          System.out.println(palindrome);
+          sum += palindrome;
+          if(++count == 5) {
+            System.out.println(sum);
+            System.exit(0);
+          }
+        }
+      }
+      len++;
+    }
+  }
+
+  private static boolean isWanted(int l) {
+
+    int cnt = 0, limit = (int)Math.cbrt(l-4);
+    for(int i=2; i<=limit; i++) {
+      double root = Math.sqrt(l-i*i*i);
+      if(root - (int)root == 0) {
+        cnt++;
+      }
+    }
+
+    return cnt == 4;
+  }
+
+}