Submission #1087813

#	Time	Username	Problem	Language	Result	Execution time	Memory
1087813		quangminh412	Bank (IZhO14_bank)	C++14	71 / 100	1075 ms	41300 KiB

bank

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

/*
  John Watson
  https://codeforces.com/profile/quangminh98

  Mua Code nhu mua Florentino !!
*/

#define faster() ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ll long long

const int maxn = 30;

int n, m;
int a[maxn], b[maxn], s[1 << 21];

signed main()
{
	if (fopen("test.inp", "r"))
	{
		freopen("test.inp", "r", stdin);
		freopen("test.out", "w", stdout);
	}
	faster();
	
	cin >> n >> m;
	int full = (1 << m);
	for (int i = 1; i <= n; i++) cin >> a[i];
	for (int i = 1; i <= m; i++) cin >> b[i];
	
	for (int mask = 0; mask < full; mask++)
	{
		int sum = 0;
		for (int i = 0; i < m; i++)
			if (mask >> i & 1)
				sum += b[i + 1];
		s[mask] = sum;
	}
	
	vector<vector<int>> dp(n + 5, vector<int>(full + 5, 0));
	vector<int> pos[maxn];
	// base case
	for (int mask = 0; mask < full; mask++)
	{
		int sum = 0;
		for (int i = 0; i < m; i++)
			if (mask >> i & 1)
				sum += b[i + 1];
		if (sum == a[1])
		{
			dp[1][mask] = 1;
			pos[1].push_back(mask);
		}
	}
	//
	for (int i = 2; i <= n; i++)
	{
		for (int mask1 : pos[i - 1])
		{
			for (int mask2 = 0; mask2 < full; mask2++)
				if ((mask1 & mask2) == 0 && s[mask2] == a[i])
				{
					dp[i][mask1 | mask2] = 1;
					pos[i].push_back(mask1 | mask2);
				}
		}
	}
	
	int ans = 0;
	for (int mask = 0; mask < full; mask++)
		ans = max(ans, dp[n][mask]);
	cout << (ans == 0 ? "NO\n" : "YES\n");

	return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:23:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |   freopen("test.inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:24:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |   freopen("test.out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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