Submission #1262351

#	Time	Username	Problem	Language	Result	Execution time	Memory
1262351		longsaumui	Bank (IZhO14_bank)	C++20	100 / 100	130 ms	8520 KiB

bank

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

int main() {
    if (fopen("task.inp" , "r")) {
        freopen("task.inp" , "r" , stdin);
        freopen("task.out" , "w" , stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    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<pair<int, int>> dp(1 << m);
    for (int s = 0; s < (1 << m); s++) {
        for (int i = 0; i < m; i++) {
            if (s & (1 << i)) continue;
            auto [id, x] = dp[s];
            int j = s | (1 << i);
            if (id == n) {
                cout << "YES" << '\n';
                return 0;
            }
            pair<int, int> cur;
            if (x + b[i] == a[id]) {
                cur = {id + 1, 0};
                if (id + 1 == n) {
                    cout << "YES" << '\n';
                    return 0;
                }
            }
            else if (x + b[i] < a[id]) {
                cur = {id, b[i] + x};
            }
            dp[j] = max(dp[j], cur);
        }
    }
    cout << "NO" << '\n';
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:6:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |         freopen("task.inp" , "r" , stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:7:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |         freopen("task.out" , "w" , stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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