countHourglass.cpp

// https://www.hackerrank.com/challenges/2d-array/problem?h_l=interview&playlist_slugs%5B%5D=interview-preparation-kit&playlist_slugs%5B%5D=arrays
#include <cmath>
#include <cstdio>
#include <vector>
#include <climits>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int a[6][6],s;
    int m=INT_MIN;
    for(int i=0;i<6;i++)
        {
        for(int j=0;j<6;j++)
            {
            cin>>a[i][j];
        }
    }
for(int i=0;i<4;i++)
    {
      for(int j=0;j<4;j++)
         {
            s=(a[i][j]+a[i][j+1]+a[i][j+2]+a[i+1][j+1]+a[i+2][j]+a[i+2][j+1]+a[i+2][j+2]);
            if(s>m){
               m=s;
            }
        }       
        
}
    cout<<m;  
    return 0;
}