using System.Collections.Generic;
public static void Main()
string nStr = Console.ReadLine();
int n = Int32.Parse(nStr.Trim());
List<List<int>> array = new List<List<int>>();
for(int i = 0; i < n; i++){
string matrixRowStr = Console.ReadLine();
string[] rowSplit = matrixRowStr.Split(' ');
List<int> rowAsInt = new List<int>();
for(int j = 0; j < rowSplit.Length; j++){
rowAsInt.Add(Int32.Parse(rowSplit[j]));
int diagSum1 = 0, diagSum2 = 0;
for(int i = 0; i < n; i++){
diagSum2 += array[i][n-i-1];
int diff = Math.Abs(diagSum1 - diagSum2);