Submission #766526

#	Time	Username	Problem	Language	Result	Execution time	Memory
766526		dxz05	Bank (IZhO14_bank)	C++17	100 / 100	80 ms	8540 KiB

bank

#pragma GCC optimize("Ofast,O3,unroll-loops")
#pragma GCC target("avx,avx2")
#include <bits/stdc++.h>

using namespace std;

int main(){
    ios_base::sync_with_stdio(false);

    int n, m;
    cin >> n >> m;

    vector<int> a(n), b(m);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < m; i++) cin >> b[i];

    for (int i = 0; i < n;){
        int j = find(b.begin(), b.end(), a[i]) - b.begin();
        if (j != m){
            a.erase(a.begin() + i);
            b.erase(b.begin() + j);
            n--;
            m--;
        } else {
            i++;
        }
    }

    if (m < n * 2){
        cout << "NO" << endl;
        return 0;
    }

    vector<pair<int, int>> dp(1 << m, make_pair(-1, -1));
    dp[0] = make_pair(0, 0);

    for (int mask = 0; mask < (1 << m); mask++){
        if (dp[mask] == make_pair(-1, -1)) continue;

        if (dp[mask] == make_pair(n, 0)){
            cout << "YES" << endl;
            return 0;
        }

        int j = dp[mask].first, has = dp[mask].second;
        if (j >= n) continue;

        for (int i = 0; i < m; i++){
            if (mask & (1 << i)) continue;

            if (has + b[i] < a[j]){
                dp[mask | (1 << i)] = max(dp[mask | (1 << i)], make_pair(j, has + b[i]));
            } else if (has + b[i] == a[j]){
                dp[mask | (1 << i)] = max(dp[mask | (1 << i)], make_pair(j + 1, 0));
            }

        }
    }

    cout << "NO" << endl;

    return 0;
}

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