Submission #813659

#	Time	Username	Problem	Language	Result	Execution time	Memory
813659		exodus_	Bank (IZhO14_bank)	C++14	100 / 100	168 ms	6068 KiB

bank

#include<bits/stdc++.h>
using namespace std;
int N,M;
vector<int>sum[21];
vector<vector<bool>>memo(21, vector<bool>(1<<20));
vector<vector<bool>>visited(21, vector<bool>(1<<20, false));
int pip[21];
bool dp(int idx, int mask) {
    bool fin=false;
    if(idx > N-1) {
        return true;
    }
    if(visited[idx][mask]==true) {
        return memo[idx][mask];
    }
    visited[idx][mask]=true;
    for(auto x:sum[idx]) {
        if((x & mask) == 0) {
            if(dp(idx+1, (x|mask)) == true) {
                fin = true;
                break;
            }
        }
    }
    memo[idx][mask]=fin;
    return fin;
}
 
int main() {
    cin >> N >> M;
    vector<int>vek(M);
    for(int i=0; i<N; i++) {
        cin >> pip[i];
    }
    for(int i=0; i<M; i++) {
        cin >> vek[i];
    }
    for(int mask=0; mask<(1<<M); mask++) {
        int sm=0;
        for(int k=0; k<M; k++) {
            int tmp = (mask>>k)&1;
            if(tmp) sm+=vek[k];
        }
        for(int i=0; i<N; i++) {
            if(sm==pip[i]) sum[i].emplace_back(mask);
        }
    }
    bool can = dp(0,0);
    if(can) cout << "YES"; else cout << "NO";
    return 0;
}

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