Submission #1183437

#	Time	Username	Problem	Language	Result	Execution time	Memory
1183437		pete555	Bank (IZhO14_bank)	C++17	100 / 100	98 ms	8520 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);
}

const int MOD = 1e9+7;

int main()
{
	cin.tie(0)->sync_with_stdio(false);
	//fileIO("");
	int n, m;
	cin >> n >> m;
	int a[n], b[m];
	for(int i = 0; i < n; i++) cin >> a[i];
	for(int i = 0; i < m; i++) cin >> b[i];
	vector<pi> dp(1<<m, {-1, -1});
	dp[0] = {0, 0};
	for(int mask = 0; mask < (1<<m); mask++){
		for(int i = 0; i < m; i++){
			if(mask & (1<<i)){
				int prev = (mask ^ (1<<i));
				if(dp[prev].first == -1) continue;
				int sal = a[dp[prev].first];
				int amt = b[i] + dp[prev].second;
				if(amt < sal) dp[mask] = {dp[prev].first, amt};
				else if(amt == sal) dp[mask] = {dp[prev].first + 1, 0};
			}
		}
		if(dp[mask].first == n){
			cout << "YES";
			return 0;
		}
	}
	cout << "NO";
	return 0;
}

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