Codechef crypthon contest.

 Problem Link

Codechef crypthon contest : hard code crypt problem solution in java.



  import java.util.*;
  class cf
  {
    static void calc(int[] arr , int n) {
      int count = 0;
      for(int i=0;i<n-3;i++) {
        for(int j=i+1;j<n-2;j++) {
          int diff = arr[j] - arr[i];
          for(int k=j+1;k<n-1;k++) {
            for(int l=k+1;l<n;l++) {
              if(arr[l] - arr[k] == diff && arr[k] - arr[j] == diff)
              {
                System.out.println(arr[i]+" : "+arr[j]+" : "+arr[k]+" : "+arr[l]);
                count ++;
              }
            }
          }
        }
      }
      System.out.println(count);
    }
    static Scanner input = new Scanner(System.in);
    public static void main(String[] args) {
      try
      {
        int n = input.nextInt();
        int[] arr = new int[n];
        for(int i=0;i<n;i++) {
          arr[i] =  input.nextInt();
        }
        calc(arr,n);
      }
      catch(Exception e){
        return;
      }
    }
  }

  11
  3 5 3 6 3 4 10 4 5 2 6

  3 : 4 : 5 : 6
  3 : 4 : 5 : 6
  3 : 4 : 5 : 6
  3 : 4 : 5 : 6
  3 : 4 : 5 : 6
  3 : 4 : 5 : 6

  Count : 6

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