Submission #1133370

#	Time	Username	Problem	Language	Result	Execution time	Memory
1133370		lopkus	Bank (IZhO14_bank)	C++20	100 / 100	401 ms	25924 KiB

bank

#include <bits/stdc++.h>

#define int long long

using namespace std;

const int MX = 1e5 + 5;

vector<int> inc[MX];

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    vector<int> a(n);
    vector<int> b(m);
    for(int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for(int i = 0; i < m; i++) {
        cin >> b[i];
    }
    for(int bitmask = 0; bitmask < (1LL << m); bitmask++) {
        int sum = 0;
        for(int j = 0; j < m; j++) {
            if(bitmask & (1LL << j)) {
                sum += b[j];
            }
        }
        inc[sum].push_back(bitmask);
    }
    vector<int> prev;
    prev.push_back(0);
    for(int i = 0; i < n; i++) {
        vector<int> qn;
        vector<int> was((1LL << m), 0);
        for(auto x : inc[a[i]]) {
            for(auto y : prev) {
                if((x & y) || was[x ^ y]) {
                    continue;
                }
                qn.push_back((x ^ y));
                was[x ^ y] = 1;
            }
        }
        prev = qn;
    }
    cout << (prev.size()? "YES" : "NO");
}

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