Submission #1226213

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226213		chuchucharles	Bank (IZhO14_bank)	C++20	0 / 100	1 ms	324 KiB

bank

#include <bits/stdc++.h>
using namespace std;
int n, m, a[25], b[25], sum[1 << 20];
bool dp[1 << 20];
signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        if (i) a[i] += a[i - 1];
    }
    for (int i = 0; i < m; i++) {
        cin >> b[i];
    }
    for (int mask = 0; mask < (1 << m); mask++) {
        sum[mask] = 0;
        for (int i = 0; i < m; i++) {
            if (mask & (1 << i)) sum[mask] += b[i];
        }
    }
    dp[0] = true;
    for (int mask = 0; mask < (1 << m); mask++) {
        if (!dp[mask]) continue;
        auto it = upper_bound(a, a + n, sum[mask]);
        if (it == a + n) continue;
        int re = *it - sum[mask];
        for (int i = 0; i < m; i++) {
            if (mask & (1 << i)) continue;
            if (b[i] <= re) dp[mask | (1 << i)] = true;
        }
        if (sum[mask] == a[n - 1]) {
            cout << "YES";
            return 0;
        }
    }
    cout << "NO";
}

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