Submission #1226219

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226219		chuchucharles	Bank (IZhO14_bank)	C++20	100 / 100	128 ms	5544 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 () {
    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++) {
        for (int j = 0; j < m; j++)
            if (mask >> j & 1) sum[mask] += b[j];
    }
    dp[0] = 1;
    for (int mask = 0; mask < (1 << m); mask++)
        if (dp[mask]) {
            int re = *upper_bound(a, a + n, sum[mask]) - sum[mask];
            for (int j = 0; j < m; j++)
                if ((mask >> j & 1) == 0 && b[j] <= re)
                    dp[mask | (1 << j)] = 1;
        }
    for (int mask = 0; mask < (1 << m); mask++)
        if (dp[mask] && sum[mask] == a[n - 1]) {
            cout << "YES";
            return 0;
        }
    cout << "NO";
}

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