Submission #170040

#	Time	Username	Problem	Language	Result	Execution time	Memory
170040		tselmegkh	Bank (IZhO14_bank)	C++14	100 / 100	501 ms	34944 KiB

bank

#include<bits/stdc++.h>
using namespace std;

int a[25], b[25], n, m;
bool dp[25][(1 << 21)];
bool vis[25][(1 << 21)];

int sum[(1 << 21)];

vector<int> to[21];

inline bool go(int v, int mask){
	if(v == n){
		return 1;
	}
	if(vis[v][mask])return dp[v][mask];
	vis[v][mask] = 1;

	bool possible = 0;

	for(int u : to[v]){
		if(!(mask & u))possible |= go(v + 1, mask | u);
	}
	return dp[v][mask] = possible;
}
int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> m;
	for(int i = 0; i < n; i++){
		cin >> a[i];
	}
	for(int i = 0; i < m; i++){
		cin >> b[i];
	}


	for(int i = 0; i < (1 << m); i++){
		for(int j = 0; j < m; j++){
			if(i & (1 << j)){
				sum[i] += b[j];
			}
		}
	}
	for(int i = 0; i < n; i++){
		for(int j = 0; j < (1 << m); j++){
			if(sum[j] == a[i]){
				to[i].push_back(j);
			}
		}
	}
	if(go(0, 0)){
		cout << "YES\n";
	}else{
		cout << "NO\n";
	}
}

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