제출 #1344292

#제출 시각아이디문제언어결과실행 시간메모리
1344292ramzialoulouTiles (BOI24_tiles)C++20
4 / 100
27 ms1860 KiB
#include <bits/stdc++.h>
 
using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, m;
  cin >> n >> m;
  vector<int> X(n), Y(n);
  for (int i = 0; i < n; i++) {
    cin >> X[i] >> Y[i];
  }
  bool ok = true;
  for (int i = 0; i < n; i++) {
    int j = (i - 1 + n) % n;
    if (X[i] == X[j]) {
      int side = abs(Y[i] - Y[j]);
      ok &= (side % 2 == 0);
    }
  }
  m -= m & 1;
  cout << (ok ? m : 0) << '\n';
  return 0;
}
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