Submission #1263737

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263737		back	Bank (IZhO14_bank)	C++20	71 / 100	1093 ms	436 KiB

bank

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

int n, m;
vector<int> a, b;
vector<int> used;
bool ok = false;

void dfs(int i) {
    if (i == n) { // phát đủ cho n người
        ok = true;
        return;
    }
    int need = a[i];
    function<void(int,int)> tryGive = [&](int pos, int sum) {
        if (ok) return;
        if (sum > need) return;
        if (sum == need) {
            dfs(i+1);
            return;
        }
        for (int j = pos; j < m; j++) if (!used[j]) {
            used[j] = 1;
            tryGive(j+1, sum + b[j]);
            used[j] = 0;
        }
    };
    tryGive(0, 0);
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> n >> m;
    a.resize(n);
    b.resize(m);
    for (int &x : a) cin >> x;
    for (int &x : b) cin >> x;

    used.assign(m, 0);
    dfs(0);
    cout << (ok ? "YES\n" : "NO\n");
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29