Submission #1308616

#	Time	Username	Problem	Language	Result	Execution time	Memory
1308616		AgentPengin	Bank (IZhO14_bank)	C++20	0 / 100	2 ms	832 KiB

bank

#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define pii pair<int,int>
#define piii pair<int,pair<int,int>>
#define vt vector
#define unmap unordered_map
#define unset unordered_set
#define pri priority_queue
#define ub upper_bound
#define lb lower_bound
#define ll long long
// #define int long long
#define getbit(x,i) ((x >> i) & 1ll)
#define NAME "chick"

using namespace std;

const ll inf = 1e18;
const int mod = 1e9 + 7;
const int maxn = 21;

int n,m,a[maxn],b[maxn],dp[maxn][1<<maxn];
vt<int> d[maxn];

signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	if(fopen(NAME".inp","r")){
		freopen(NAME".inp","r",stdin);
		freopen(NAME".out","w",stdout);
	}
	
	cin >> n >> m;
	for(int i = 1; i <= n; i++){
		cin >> a[i];
	}
	for(int i = 1; i <= m; i++){
		cin >> b[i];
	}
	
	sort(a + 1, a + n + 1);
	sort(b + 1, b + m + 1);//
	
	for(int mask = 0; mask < (1 << m); mask++){
		int sum = 0;
		for(int j = 1; j <= m; j++){
			if(getbit(mask,j-1)) sum += b[j];
		}
		for(int i = 1; i <= n; i++){
			if(a[i] == sum) d[i].pb(mask);
		}
	}
	
	dp[0][0] = 1;
	for(int i = 1; i <= n; i++){
		for(int mask = 0; mask < (1 << m); mask++){
			for(auto x : d[i]){
				if(mask & x  != x) continue;
				dp[i][mask] |= dp[i-1][~(mask ^ x)];
			}
			if(i == n && dp[i][mask]){
				cout << "YES";
				return 0;
			}
		}
	}
	cout << "NO";
	
	
	
	return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:32:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |                 freopen(NAME".inp","r",stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
bank.cpp:33:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |                 freopen(NAME".out","w",stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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