Submission #1086963

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086963		ArtistWall	Bank (IZhO14_bank)	C++17	100 / 100	92 ms	8644 KiB

bank

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

int main() {
	int people_num;
	int note_num;
	cin >> people_num >> note_num;
	vector<int> people(people_num);
	vector<int> banknotes(note_num);
	for (int &p : people) { cin >> p; }
	for (int &b : banknotes) { cin >> b; }
	vector<int> leftover(1 << note_num, -1);
	vector<int> people_covered(1 << note_num, -1);
	leftover[0] = 0;
	people_covered[0] = 0;
	for (int s = 0; s < (1 << note_num); s++) {
		for (int last = 0; last < note_num; last++) {
			if ((s & (1 << last)) == 0) { continue; }
			int prev = s & ~(1 << last);
			if (people_covered[prev] == -1) { continue; }

			int new_amt = leftover[prev] + banknotes[last];
			int curr_target = people[people_covered[prev]];
			if (new_amt < curr_target) {
				people_covered[s] = people_covered[prev];
				leftover[s] = new_amt;
			}
			else if (new_amt == curr_target) {
				people_covered[s] = people_covered[prev] + 1;
				leftover[s] = 0;
			}
		}
		if (people_covered[s] == people_num) {
			cout << "YES" << endl;
			return 0;
		}
	}
	cout << "NO" << endl;
}

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