Submission #657643

#	Time	Username	Problem	Language	Result	Execution time	Memory
657643		Iliya	Bank (IZhO14_bank)	C++17	100 / 100	195 ms	12696 KiB

bank

// Freedom will be ours
#include<bits/stdc++.h>
#define ones(x) __builtin_popcount(x)

using namespace std;
typedef long long ll;
typedef long double ld;

const int N = 21, M = 21;
int dp[1 << M], rem[1 << M], mark[1 << M], y;

int high(int x){
	for(int i = 20; i >= 0; i--)
		if(x & (1 << i))
			return i;
	return 0;
}

int main(){
	ios::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
	
	int n, m;
	cin >> n >> m;
	vector<int> a(n), b(m);
	for(int& i : a) cin >> i;
	for(int& i : b) cin >> i;
	mark[0] = 1;
	for(int mask = 0; mask < (1 << m); mask++){
		for(int	i = 0; i < m; i++){
			if(mark[mask ^ (1 << i)] and (mask & (1 << i))){
				int last = dp[mask ^ (1 << i)];
				int curr = rem[mask ^ (1 << i)] + b[i];
				if(curr > a[last]) continue;
				dp[mask] = last + (curr == a[last] ? 1 : 0);
				rem[mask] = (curr == a[last] ? 0 : curr);
				mark[mask] = 1;
			}
		}
		if(dp[mask] == n) y = 1;
	}
	cout << (y ? "YES" : "NO") << '\n';
    return 0;
}

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