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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. #define all(x) begin(x), end(x)
  5.  
  6. const int N = 1e4;
  7. mt19937 rnd;
  8. double a[N], b[N];
  9.  
  10. int main() {
  11. 	for (int i = 0; i < N; ++i) {
  12. 		a[i] = rnd();
  13. 	}
  14. 	for (int i = 0; i < N; ++i) {
  15. 		b[i] = rnd();
  16. 	}
  17.  
  18. 	auto st = chrono::system_clock::now();
  19.  
  20. 	double h = 0;
  21. 	for (int it = 0; it < N; ++it) {
  22. 		for (int i = 0; i < N; ++i) {
  23. 			double cur = sqrt(a[i]);
  24. 			h += cur;
  25. 		}
  26. 	}
  27.  
  28.     auto fn = chrono::system_clock::now();
  29.  
  30.     assert(h != 19);
  31.  
  32.     cout << fixed << setprecision(1) << 1000 * chrono::duration<double>(fn - st).count() << endl;
  33.  
  34. 	return 0;
  35. }
  36.  
Success #stdin #stdout 0.52s 4420KB
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stdin 
Standard input is empty
stdout 
522.7
https://ideone.com/0jcc1x
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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