Submission #1169047

#	Time	Username	Problem	Language	Result	Execution time	Memory
1169047		GoBananas69	Bank (IZhO14_bank)	C++20	25 / 100	1 ms	840 KiB

bank

#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <bitset>
typedef long long ll;
using namespace std;
bool ok = false;
ll n, m;

void solve(ll curr, ll k, vector<ll> &a, vector<vector<ll>> &mask) {
    if (k == n) {
        cout << "YES\n";
        exit(0);
    }
    for (auto &i: mask[a[k]]) {
        if (!(curr & i)) {
            solve(curr | i, k + 1, a, mask);
        }
    }
}

signed main() {
    cin.tie() -> sync_with_stdio(0);
    cin >> n >> m;
    vector<ll> a(n), b(m);
    if (n > m) {
        cout << "NO\n";
        return 0;
    }
    ll sum = 0;
    for (ll i = 0; i<n; ++i) cin >> a[i];
    for (ll i = 0; i<m; ++i) {
        cin >> b[i];
        sum += b[i];
    }

    vector<vector<ll>> mask(sum + 1); 
    
    for (ll i = 1; i<=(1 << m); ++i) {
        ll curr = 0;
        for (ll j = 0; j<m; ++j) {
            if (i & (1 << j)) curr += b[j];
        }
        mask[curr].push_back(i);
    }
    
    if (n == 1) {
        if (mask[a[0]].empty()) {
            cout << "NO\n";
            return 0;
        }
        cout << "YES\n";
        return 0;
    }
    
    for (ll i = 0; i<n; ++i) {
        if (mask[a[i]].empty()) {
            cout << "NO\n";
            return 0;
        }
    }

    solve(0, 0, a, mask);

    cout << "NO\n";
}

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