Submission #1077956

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077956		MyCode	Bank (IZhO14_bank)	C++17	100 / 100	113 ms	8788 KiB

bank

#include <bits/stdc++.h>

using namespace std;

int sum[(1 << 20)], dp[(1 << 20)];

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr), cout.tie(nullptr);
    int n, m;
    cin >> n >> m;
    int a[n], b[m], pref[n];
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < n; i++) pref[i] = a[i] + (i > 0 ? pref[i - 1] : 0);
    for (int i = 0; i < m; i++) cin >> b[i];
    for (int mask = 0; mask < (1 << m); mask++) {
        sum[mask] = 0;
        for (int bit = 0; bit < m; bit++)
            sum[mask] += ((mask >> bit) & 1) * b[bit];
    }
    for (int mask = 0; mask < (1 << m); mask++) {
        dp[mask] = -1;
        for (int bit = 0; bit < m; bit++) {
            if (((mask >> bit) & 1) == 1)
                dp[mask] = max(dp[mask], dp[mask - (1 << bit)]);
        }
        int i = 0;
        while (i < n && pref[i] != sum[mask]) i++;
        if (i == n) continue;
        if (i == 0) {
            dp[mask] = 0;
            continue;
        }
        for (int bit = 0; bit < m; bit++) {
            if (((mask >> bit) & 1) == 1 && dp[mask - (1 << bit)] != -1) {
                int left = sum[mask - (1 << bit)] - pref[dp[mask - (1 << bit)]] + b[bit];
                if (left == a[i]) {
                    dp[mask] = i;
                    break;
                }
            }
        }
    }
    cout << (dp[(1 << m) - 1] == n - 1 ? "YES" : "NO");
    return 0;
}

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