04. Diagonal Difference

#include <iostream>
using namespace std;

#define SIZE 100

int main()
{
  int matrix[SIZE][SIZE];
  int size;
  cin >> size;
  int sum_left = 0, sum_right = 0;

  for(int i = 0; i < size ; i++)
  {
    for(int j = 0; j < size; j++)
    {
      cin >> matrix[i][j];
      if(i==j)
        sum_left += matrix[i][j];
      if((i+j) == size - 1)
        sum_right += matrix[i][j];
    }
  }
  if(sum_right > sum_left)
  {
    cout << sum_right - sum_left;
  }
  if(sum_left > sum_right)
  {
    cout << sum_left - sum_right;
  }
  return 0;
}