Submission #656387

#	Time	Username	Problem	Language	Result	Execution time	Memory
656387		iskhakkutbilim	Bank (IZhO14_bank)	C++14	71 / 100	1095 ms	8096 KiB

bank

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

//#define int long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int M = 1e9 + 7;
const int N = 21;
int dp[N][1<<N], a[N], b[N];
int n, m;
vector<int> g[N];

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 mask = 0; mask < (1<<m); mask++){
		int sum = 0;
		for(int i = 0;i < m; i++){
			if(mask & (1<<i)){
				sum+= b[i];
			}
		}
		for(int i = 0;i < n; i++){
			if(a[i] == sum){
				g[i].push_back(mask);
			}
		}
	}
	for(int i = 0;i < n; i++){
		if(g[i].empty()){
			cout << "NO";
			return 0;
		}
	}
	for(auto x : g[0]){
		dp[0][x] = 1;
	}
	for(int i = 1;i < n; i++){
		for(int mask = 0; mask < (1<<m); mask++){
//			if(dp[i-1][mask] == 0){
//				continue;
//			}
			for(auto x : g[i]){
				if((mask & x) == 0 and dp[i-1][mask]==1){
					dp[i][mask|x] = 1;
				}
			}
		}
	}
	for(int mask = 1; mask < (1<<m); mask++){
		if(dp[n-1][mask] == 1){
			cout << "YES";
			return 0;
		}
	}
	cout << "NO";
	return 0;
}

Compilation message (stderr)

bank.cpp:14:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   14 | main(){
      | ^~~~

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