Submission #1279004

#	Time	Username	Problem	Language	Result	Execution time	Memory
1279004		lmquan	Bank (IZhO14_bank)	C++20	100 / 100	96 ms	8652 KiB

bank

#define taskname ""
#include <bits/stdc++.h>
using namespace std;

int main() {
  if (fopen(taskname".inp", "r")) {
    freopen(taskname".inp", "r", stdin);
    freopen(taskname".out", "w", stdout);
  }
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);

  int n, m;
  cin >> n >> m;
  vector<int> a(n), b(m);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  for (int i = 0; i < m; i++) {
    cin >> b[i];
  }
  vector<int> x(1 << m, -1), y(1 << m, -1);
  x[0] = y[0] = 0;
  for (int i = 1; i < (1 << m); i++) {
    for (int j = 0; j < m; j++) {
      if ((i >> j & 1) && x[i ^ (1 << j)] != -1) {
        int u = y[i ^ (1 << j)] + b[j], v = a[x[i ^ (1 << j)]];
        if (u == v) {
          x[i] = x[i ^ (1 << j)] + 1, y[i] = 0;
        } else if (u < v) {
          x[i] = x[i ^ (1 << j)], y[i] = u;
        }
      }
    }
    if (x[i] == n) {
      cout << "YES";
      return 0;
    }
  }

  cout << "NO";

  return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:7:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     freopen(taskname".inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:8:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     freopen(taskname".out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29