Submission #169135

#	Time	Username	Problem	Language	Result	Execution time	Memory
169135		LinusTorvaldsFan	Bank (IZhO14_bank)	C++14	71 / 100	72 ms	632 KiB

bank

#include <iostream>
#include <vector>
#include <memory.h>

using namespace std;

const int N = 20;
const int M = 14;
const int masks = 1 << M;

bool dp[masks][N];

int main() {
	int n, m;
	cin >> n >> m;
	vector<int>a(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	vector<int>b(m);
	for (int i = 0; i < m; i++) {
		cin >> b[i];
	}
	if (n == 1) {
		for (int mask = 0; mask < (1 << m); mask++) {
			int cur = 0;
			for (int j = 0; j < m; j++) {
				if (mask & (1 << j)) {
					cur += b[j];
				}
			}
			if (cur == a[0]) {
				cout << "YES";
				return 0;
			}
		}
		cout << "NO";
		return 0;
	}
	if (n <= 20 && m <= 14) {
		memset(dp, 0, sizeof(dp));
		dp[0][0] = true;
		for (int mask = 0; mask < (1 << m); mask++) {
			for (int j = 0; j < n; j++) {
				if (!dp[mask][j])continue;
				int lost = (~mask + (1<<m)) % (1 << m);
				for (int submask = lost;; submask = (submask - 1) & lost) {
					int sum = 0;
					for (int t = 0; t < m; t++) {
						if (submask & (1 << t)) {
							sum += b[t];
						}
					}
					if (sum == a[j]) {
						dp[mask + submask][j + 1] = true;
					}


					if (submask == 0)break;
				}
			}
		}
		for (int mask = 0; mask < (1 << m); mask++) {
			if (dp[mask][n]) {
				cout << "YES";
				return 0;
			}
		}
		cout << "NO";
	}

	return 0;
}

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