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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4.  
  5. const int MAXN = 6000000;
  6.  
  7. int main() {
  8. 	vector<bool> sieve(MAXN);
  9. 	vector<int> primes;
  10. 	for (int i = 2; i < MAXN; i++) {
  11. 		if (sieve[i]) continue;
  12. 		primes.push_back(i);
  13. 		for (int j = i; j < MAXN; j += i) {
  14. 			sieve[j] = 1;
  15. 		}
  16. 	}
  17. 	vector<ll> psum(primes.size(), 0);
  18. 	for (int i = 0; i < (int) primes.size(); i++) {
  19. 		psum[i] = (i ? psum[i - 1] : 0) + primes[i];
  20. 	}
  21.  
  22. 	cin.tie(0)->sync_with_stdio(0);
  23. 	int t; cin >> t;
  24. 	while (t--) {
  25. 		int n; cin >> n;
  26. 		vector<int> a(n);
  27.  
  28. 		for (int &x : a) {
  29. 			cin >> x;
  30. 		}
  31.  
  32. 		sort(a.rbegin(), a.rend());
  33. 		int ans = 0;
  34. 		ll sum = 0;
  35. 		for (int i = 0; i < n; i++) {
  36. 			sum += a[i];
  37. 			if (sum >= psum[i]) {
  38. 				ans = i + 1;	
  39. 			}
  40. 		}
  41. 		cout << n - ans << '\n';
  42. 	}
  43. }
  44.  
  45.  
  46.  
  47.  
Success #stdin #stdout 0.04s 8720KB
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stdin
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5
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5 5 5
4
2 3 2 4
1
3
3
2 100 2
5
2 4 2 11 2
stdout
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0
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0
1
https://ideone.com/ixqYX6
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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