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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. typedef long double ld;
  5. #define all(x) begin(x), end(x)
  6.  
  7. const int N = 1e4;
  8. mt19937 rnd;
  9. ld a[N], b[N];
  10.  
  11. int main() {
  12. 	for (int i = 0; i < N; ++i) {
  13. 		a[i] = rnd();
  14. 	}
  15. 	for (int i = 0; i < N; ++i) {
  16. 		b[i] = rnd();
  17. 	}
  18.  
  19. 	auto st = chrono::system_clock::now();
  20.  
  21. 	ld h = 0;
  22. 	for (int it = 0; it < N; ++it) {
  23. 		for (int i = 0; i < N; ++i) {
  24. 			ld cur = sqrt(a[i]);
  25. 			h += cur;
  26. 		}
  27. 	}
  28.  
  29.     auto fn = chrono::system_clock::now();
  30.  
  31.     assert(h != 19);
  32.  
  33.     cout << fixed << setprecision(1) << 1000 * chrono::duration<double>(fn - st).count() << endl;
  34.  
  35. 	return 0;
  36. }
  37.  
Success #stdin #stdout 0.44s 4300KB
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440.4
https://ideone.com/jRrEGV
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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