제출 #570041

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
570041		600Mihnea	Nuclearia (CEOI15_nuclearia)	C++17	0 / 100	383 ms	1048576 KiB

nuclearia

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

signed main() {
  ios::sync_with_stdio(0); cin.tie(0);

  freopen ("input.txt", "r", stdin);

  int n, m;
  cin >> n >> m;
  vector<vector<ll>> radiation(n + 1, vector<ll> (m + 1, 0));

  int ops;
  cin >> ops;
  for (int i = 1; i <= ops; i++) {
    int r1, c1, a, b;
    cin >> r1 >> c1 >> a >> b;
    for (int r = 1; r <= n; r++) {
      for (int c = 1; c <= m; c++) {
        int dist = max(abs(r - r1), abs(c - c1));
        radiation[r][c] += max(0LL, a - 1LL * b * dist);
      }
    }
  }

  {
    /// transform the radiation in the form of prefix rectangle sum

    for (int i = 1; i <= n; i++) {
      ll cur = 0;
      for (int j = 1; j <= m; j++) {
        cur += radiation[i][j];
        radiation[i][j] = radiation[i - 1][j] + cur;
      }
    }
  }

  int q;
  cin >> q;
  while (q--) {
    int r1, c1, r2, c2;
    cin >> r1 >> c1 >> r2 >> c2;
    ll total = radiation[r2][c2] - radiation[r1 - 1][c2] - radiation[r2][c1 - 1] + radiation[r1 - 1][c1 - 1];
    ll area = (r2 - r1 + 1) * (c2 - c1 + 1);

    cout << total / area + (total % area >= area - total % area) << "\n";
  }
}

컴파일 시 표준 에러 (stderr) 메시지

nuclearia.cpp: In function 'int main()':
nuclearia.cpp:10:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |   freopen ("input.txt", "r", stdin);
      |   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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