Submission #1005361

#	Time	Username	Problem	Language	Result	Execution time	Memory
1005361		GasmaskChan	Bank (IZhO14_bank)	C++17	100 / 100	74 ms	16872 KiB

bank

#include <bits/stdc++.h>

using namespace std;
#define int long long
#define MAX 20

int a[MAX], b[MAX], f[1 << MAX], l[1 << MAX];
int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
//    freopen("test.inp", "r", stdin); freopen("test.out", "w", stdout);
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < m; i++) cin >> b[i];

    memset(f, -1, sizeof f);
    f[0] = 0;
    for (int mask = 0; mask < (1 << m); mask++) {
        for (int j, cur = mask; cur; cur ^= -cur & cur) {
            j = __builtin_ctz(cur);
            if (f[mask ^ (1 << j)] == -1) continue;

            int newleft = l[mask ^ (1 << j)] + b[j];
            if (newleft == a[f[mask ^ (1 << j)]]) {
                f[mask] = f[mask ^ (1 << j)] + 1;
                l[mask] = 0;
            }
            else if (newleft < a[f[mask ^ (1 << j)]]) {
                f[mask] = f[mask ^ (1 << j)];
                l[mask] = newleft;
            }
        }

        if (f[mask] == n) return cout << "YES", 0;
    }

    cout << "NO";
    return 0;
}

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