Submission #887585

#	Time	Username	Problem	Language	Result	Execution time	Memory
887585		mertozel	Bank (IZhO14_bank)	C++11	100 / 100	103 ms	8796 KiB

bank

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

int main(){

	int n, m;
	cin >> n >> m;
	vector<int> people(n), banknotes(m);

	for(int &i : people) cin >> i;
	for(int &i : banknotes) cin >> i;

	vector<int> prefix_people(1<<m, -1), leftover(1<<m, -1);

	prefix_people[0] = 0, leftover[0] = 0;

	for(int s = 0; s<(1<<m); s++) {
		for(int last = 0; last < m; last++) {
			if((s & (1<<last)) == 0) continue;
			int prev = s & ~(1<<last);
			if(prefix_people[prev] == -1 || leftover[prev] == -1) continue;

			int our_sum = leftover[prev] + banknotes[last]; 
			int our_man = prefix_people[prev];
			if(our_sum < people[our_man]) {
				leftover[s] = our_sum;
				prefix_people[s] = prefix_people[prev];
			}

			else if(our_sum == people[our_man]) {
				prefix_people[s] = prefix_people[prev]+1;
				leftover[s] = 0;
			}
		}

		if(prefix_people[s] == n) {cout << "YES"; return 0;}
	} 

	cout << "NO";

	




	return 0;
}

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