Submission #1307188

#	Time	Username	Problem	Language	Result	Execution time	Memory
1307188		pete555	Bank (IZhO14_bank)	C++17	0 / 100	2 ms	572 KiB

bank

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

#define pi pair<int,int>
#define ll long long
#define pb push_back
#define pf push_front

void fileIO(string filename) {
	freopen((filename + ".in").c_str(), "r", stdin);
	freopen((filename + ".out").c_str(), "w", stdout);
}

int main()
{
	cin.tie(0)->sync_with_stdio(false);
	//fileIO("");
	int n, m;
	cin >> n >> m;
	vector<int> a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}	
	vector<int> b(n);
	for (int i = 0; i < m; i++) {
		cin >> b[i];
	}
	map<int, vector<int>> vals;
	for (int s = 0; s < (1 << m); s++) {
		int val = 0;
		for (int i = 0; i < m; i++) {
			if (s & (1 << i)) {
				val += b[i];
			}
		}
		vals[val].pb(s);
	}
	vector<int> dp(1 << m);
	dp[0] = 1;
	for (int i = 0; i < n; i++) {
		vector<int> new_dp(1 << m);
		for (int s = 0; s < (1 << m); s++) {
			for (int x : vals[a[i]]) {
				if ((s & x) == x) {
					new_dp[s] |= dp[s ^ x];
				}
			}
		}
		dp = new_dp;
	}
	for (int s = 0; s < (1 << m); s++) {
		if (dp[s] == 1) {
			cout << "YES\n";
			return 0;
		}
	}
	cout << "NO\n";
}

Compilation message (stderr)

bank.cpp: In function 'void fileIO(std::string)':
bank.cpp:10:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         freopen((filename + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:11:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         freopen((filename + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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