Submission #406555

#	Time	Username	Problem	Language	Result	Execution time	Memory
406555		CrouchingDragon	Bank (IZhO14_bank)	C++17	100 / 100	105 ms	8644 KiB

bank

#include "bits/stdc++.h"

using namespace std;

#define endl '\n'
#define debug(x) cerr << #x << " == " << (x) << '\n';
#define all(x) begin(x), end(x)

using ll = long long;

const int INF = 0x3f3f3f3f;
const ll LINF = 0x3f3f3f3f3f3f3f3fLL;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int N, M;
    cin >> N >> M;

    vector<int> a(N), b(M);
    for (auto& x : a) cin >> x;
    for (auto& x : b) cin >> x;

    partial_sum(all(a), begin(a));

    string ans = "NO";

    vector<int> dp(1 << M), sum(1 << M);

    for (int j = 0; j < M; ++j) sum[1 << j] = b[j];

    for (int mask = 0; mask < (1 << M); ++mask) {
        int lsb = mask & -mask;
        sum[mask] = sum[mask ^ lsb] + sum[lsb];

        if (dp[mask] == N) {
            ans = "YES";
            break;
        }
        for (int j = 0; j < M; ++j) {
            int nmask = mask | 1 << j, nsum = sum[mask] + b[j];
            if ((mask >> j & 1) == 0 && nsum <= a[dp[mask]]) {
                dp[nmask] = dp[mask] + (nsum == a[dp[mask]] ? 1 : 0);
            }
        }
    }

    cout << ans << endl;

    exit(0);
}

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