Submission #768090

#	Time	Username	Problem	Language	Result	Execution time	Memory
768090		raysh07	Bank (IZhO14_bank)	C++17	100 / 100	642 ms	103284 KiB

bank

#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define INF (int)1e18

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() 
{
    int n, m; cin >> n >> m;
    
    vector <int> a(n), b(m);
    for (auto &x : a) cin >> x;
    for (auto &x : b) cin >> x;
    vector <int> adj[1 << m];
    
    for (int i = 0; i < (1 << m); i++){
        for (int j = 0; j < m; j++){
            if (i >> j & 1) adj[i].push_back(j);
        }
        
        // cout << i << "\n";
        // for (int j : adj[i]){
        //     cout << j << " ";
        // }
        // cout << "\n";
    }
//    return;
    
    int s1 = 0;
    vector <int> s(1 << m, 0);
    for (int i = 1; i < (1 << m); i++){
        for (int j = 0; j < m; j++){
            if (i >> j & 1) s[i] += b[j];
        }
    }
    
    vector <bool> can(1 << m, false);
    can[0] = true;
    for (auto x : a){
        s1 += x;
        vector <bool> nc(1 << m, false);
        
        for (int i = 0; i < (1 << m); i++){
            nc[i] = can[i];
            
            for (int j : adj[i]){
                {
                    int mask = i ^ (1 << j);
                    if (nc[mask] && s[mask] >= s1 - x && s[i] <= s1){
                        nc[i] = true;
                    }
                }
            }
            
            if (nc[i] && s[i] == s1) can[i] = true;
            else can[i] = false;
        }
    }
    
    for (auto x : can) if (x == true){
        cout << "YES\n";
        return;
    }
    cout << "NO\n";
}

int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
 //   cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

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