Submission #996716

#	Time	Username	Problem	Language	Result	Execution time	Memory
996716		Vietnow	Bank (IZhO14_bank)	C++17	100 / 100	160 ms	14556 KiB

bank

#include <bits/stdc++.h>
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define int long long
#define ff first
#define ss second
#define pb push_back
#define dd double
#define tm zildjian
 
using namespace std;
 
const int N = 21;
const int INF = 1e18;
const int mod = 1e9+7;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
 
 
// int binpow (int a, int n) {
// 	if (n == 0)
// 		return 1;
// 	if (n % 2 == 1)
// 		return (binpow (a, n-1)%mod * a%mod)%mod;
// 	else {
// 		int b = binpow (a, n/2) % mod;
// 		return (b%mod * b%mod)%mod;
// 	}
// }

int n,m;
vector<int> mask[N];
int a[N],b[N];
bool was[N][1<<N];

void dfs(int i, int curr_mask){
    if(i == n+1){
        yes;
        exit(0);
    }
    if(was[i][curr_mask]) return;
    was[i][curr_mask] = 1;
    for(auto to:mask[i]){
        if(curr_mask&to) continue;
        dfs(i+1,curr_mask|to); 
    }
}

void solve(){
    cin>>n>>m;
    for(int i = 1;i<=n;i++) cin>>a[i];
    for(int i = 1;i<=m;i++) cin>>b[i];
    for(int msk = 0;msk<(1<<m);msk++){
        int sum = 0;
        for(int i = 0;i<m;i++){
            if(msk&(1<<i)) sum+=b[i+1];
        }
        for(int i = 1;i<=n;i++){
            if(a[i] == sum) mask[i].pb(msk);
        }
    }
    dfs(1,0);
    no;
}

signed main(){
    // freopen("search.in","r",stdin);
    // freopen("search.out","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    // cout.tie(nullptr);
    int t = 1;
    // cin>>t;
    for(int i = 1;i<=t;i++){
        // cout<<"Case "<<i<<": ";
        solve();
    }
}

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