Stack

#include <iostream>
#include <vector>
#include <algorithm>
 
int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(0);
 
	int n;
	std::cin >> n;
 
	std::vector<int> rocks (n);
	for (int i = 0; i < n; ++i) {
		std::cin >> rocks[i];
	}
	std::sort(rocks.begin(), rocks.end());
	long long total = 0;
	int count = 0;
	for (int i = 0; i < n; ++i) {
		if (rocks[i] > total) {
			++count;
			total += rocks[i];
		}
	}
	std::cout << count << '\n';
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED