Submission #594036

#	Time	Username	Problem	Language	Result	Execution time	Memory
594036		leroycut	Bank (IZhO14_bank)	C++17	44 / 100	1078 ms	6480 KiB

bank

#include <bits/stdc++.h>
 
using namespace std;
using ll = long long;
using ld = long double;
 
const int N = 100003, mod = 1e9 + 7, inf = 1e9 + 7;

bool dp[21][(1 << 21)];
bool one_only[21][(1 << 21)];
int n, m;

void f(int i, int s){
    one_only[i][s] = true;
    for(int j = 0; j < m; ++j){
        if(!(s & (1 << j))){
            if(!one_only[i][s + (1 << j)]){
                f(i, s + (1 << j));
            }
        }
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
    // freopen("movie.in", "r", stdin);
    // freopen("movie.out", "w", stdout);

    
    cin >> n >> m;
    vector<int> vn(n), vm(m), sum((1 << m));

    for(int i = 0; i < n; ++i){
        cin >> vn[i];
    }
    for(int j = 0; j < m; ++j){
        cin >> vm[j];
    }

    for(int s = 1; s < (1 << m); ++s){
        for(int i = 0; i < m; ++i){
            if((s & (1 << i))) sum[s] += vm[i];
        }
    }

    for(int i = 0; i < n; ++i){
        for(int s = 1; s < (1 << m); ++s){
            if(sum[s] == vn[i]){
                f(i, s);
            }
        }
    }

    // for(int i = 0; i < n; ++i){
    //     for(int s = 1; s < (1 << m); ++s){
    //         cout << i << ' ' << s << " " << one_only[i][s] << "\n";
    //     }
    // }

    for(int s = 1; s < (1 << m); ++s){
        if(one_only[0][s]) dp[0][s] = true;
    }

    for(int i = 1; i < n; ++i){
        for(int s = 1; s < (1 << m); ++s){
            if(one_only[i][s]){
                for(int s2 = 1; s2 < (1 << m); ++s2){
                    if((s & s2) != 0) continue;
                    if(dp[i - 1][s2]){
                        dp[i][s + s2] = true;
                    }
                }
            }
        }
    }

    if(dp[n - 1][(1 << m) - 1]){
        cout << "YES";
    }else{
        cout << "NO";
    }
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29