Submission #7093744

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Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <set>
using namespace std;
using Data = pair<long long, vector<int> >;

int main() {
  const int N = 3;
  vector<vector<int>> vv(N, vector<int>(N));
  for(int i = 0; i < 3; i++) for(int j = 0; j < 3; j++) cin >> vv[i][j];
  bool ok = true;
  if(vv[0][0] - vv[0][1] != vv[1][0] - vv[1][1]) ok = false;
  if(vv[1][0] - vv[1][1] != vv[2][0] - vv[2][1]) ok = false;
  if(vv[0][1] - vv[0][2] != vv[1][1] - vv[1][2]) ok = false;
  if(vv[1][1] - vv[1][2] != vv[2][1] - vv[2][2]) ok = false;
  if(vv[0][0] - vv[1][0] != vv[0][1] - vv[1][1]) ok = false;
  if(vv[0][1] - vv[1][1] != vv[0][2] - vv[1][2]) ok = false;
  if(vv[1][0] - vv[2][0] != vv[1][1] - vv[2][1]) ok = false;
  if(vv[1][1] - vv[2][1] != vv[1][2] - vv[2][2]) ok = false;
  if(ok) cout << "Yes" << endl;
  else cout << "No" << endl;
}

Submission Info

Judge Result