Submission #502454

#	Time	Username	Problem	Language	Result	Execution time	Memory
502454		clams	Bank (IZhO14_bank)	C++17	100 / 100	107 ms	16728 KiB

bank

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

const int N = 20;

int n, m, a[N + 5], b[N + 5];
int lef[(1 << N) + 5];
int done[(1 << N) + 5];

signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> m;
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < m; i++) cin >> b[i];

    memset(lef, -1, sizeof lef);
    memset(done, -1, sizeof done);
    lef[0] = 0;
    done[0] = 0;
    for (int s = 0; s < (1 << m); s++) {
        for (int i = 0; i < m; i++) {
            if ((s >> i) & 1) {
                int t = s ^ (1 << i);
                if (done[t] == -1) continue;

                int x = lef[t] + b[i];
                int need = a[done[t]];
                if (x < need) {
                    done[s] = done[t];
                    lef[s] = x;
                } else if (x == need) {
                    done[s] = done[t] + 1;
                    lef[s] = 0;
                }
            }
        }

        if (done[s] == n) {
            cout << "YES";
            return 0;
        }
    }

    cout << "NO";
    return 0;
}

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