Submission #499088

#	Time	Username	Problem	Language	Result	Execution time	Memory
499088		boykut	Bank (IZhO14_bank)	C++14	19 / 100	63 ms	332 KiB

bank

#include <bits/stdc++.h>

using namespace std;

int a[22], b[22];

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	srand(time(NULL));

	int n, m;
	cin >> n >> m;

	for (int i = 0; i < n; i++) cin >> a[i];
	for (int i = 0; i < m; i++) cin >> b[i];

	if (n == 1) {
		for (int mask = 0; mask < (1 << m); mask++) {
			int ans = 0;
			for (int i = 0; i < m; i++)
				if (mask & (1 << i))
					ans += b[i];
			if (ans == a[0])
				return cout << "YES\n", 0;
		}
		cout << "NO\n";
		return 0;
	}
	if (m <= 10) {
		vector<int> s(1 << m, 0);
		for (int mask = 0; mask < (1 << m); mask++) {
			for (int i = 0; i < m; i++)
				if (mask & (1 << i)) s[mask] += b[i];
		}

		vector<vector<int>> dp(n + 1, vector<int> (1 << m));
		dp[0] = vector<int> (1 << m, 1);
		for (int i = 0; i < n; i++) {
			for (int mask = 0; mask < (1 << m); mask++) {
				if (s[mask] != a[i]) continue;
				for (int prev = 0; prev < (1 << m); prev++) {
					if ((prev & mask) != 0) continue;
					if (dp[i][prev] == 1)
						dp[i + 1][mask] = 1;
				}
			}
		}

		int ok = 0;
		for (int mask = 0; mask < (1 << m); mask++)
			if (dp[n][mask]) ok = 1;
		if (ok == 1)
			cout << "YES\n";
		else
			cout << "NO\n";
		return 0;
	}

	return 0;
}

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