Submission #954107

#	Time	Username	Problem	Language	Result	Execution time	Memory
954107		Ariadna	Bank (IZhO14_bank)	C++14	100 / 100	235 ms	103372 KiB

bank

#include <bits/stdc++.h>
#define mp make_pair

using namespace std;

bool pay(int n, int m, vector<int>& a, vector<int>& b) {
    if (m < n) return false;

    vector<bool> ans(n, false);
    vector<vector<int>> dp(n, vector<int>(1<<m, -1));
    queue<pair<int, pair<int, int>>> q;
    q.push(mp(0, mp(0, a[0])));
    while (!q.empty()) {
        int mask = q.front().first;
        int index = q.front().second.first;
        int sum = q.front().second.second;
        q.pop();

        if(dp[index][mask] != -1) continue;
        for (int i = 0; i < m; ++i) {
            if (!(mask & (1<<i))) {
                if (b[i] < sum) {
                    q.push(mp(mask | (1<<i), mp(index, sum - b[i])));
                } else if (b[i] == sum) {
                    ans[index] = true;
                    dp[index][mask] = 1;
                    if (index + 1 < n) q.push(mp(mask | (1<<i), mp(index+1, a[index+1])));
                }
            }
        }
        if (dp[index][mask] == -1) dp[index][mask] = 0;
    }
    return ans[n-1];
}

int main() {
    int n, m;
    cin >> n >> m;
    vector<int> a(n), b(m);
    for (int i = 0; i < n; ++i) cin >> a[i];
    for (int j = 0; j < m; ++j) cin >> b[j];
    if (pay(n, m, a, b)) cout << "YES\n";
    else cout << "NO\n";

    return 0;
}

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