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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int check(double a, double b){
  6.   double x = a*b;
  7.   double d = floor(x);
  8.   if(x/d==1){
  9.     return 1;
  10.   }
  11.   return 0;
  12. }
  13.  
  14. int main(){
  15. 	ios::sync_with_stdio(false);
  16. 	cin.tie(0);
  17. 	int n;
  18. 	cin >> n;
  19. 	double a[n];
  20. 	int count = 0;
  21. 	set<double> s;
  22. 	for(int i=0; i<n; i++){
  23. 		cin >> a[i];
  24. 		s.insert(a[i]);
  25. 	}
  26.  
  27. 	for(int i=0; i<n; i++){
  28. 		if(i==n-1)
  29. 			break;
  30. 		for(int j=i+1; j<n; j++){
  31. 			if(check(a[i],a[j])==1){
  32. 				count++;
  33. 			}
  34. 		}
  35. 	}
  36. 	int size = (int)s.size();
  37. 	if(size!=n){
  38. 		count = count - (n-size);
  39. 	}
  40. 	cout << count << "\n";
  41. 	return 0;
  42. }
  43.  
Success #stdin #stdout 0s 4292KB
comments (?)
stdin
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11
0.9
1
1
1.25
2.30000
5
70
0.000000001
9999.999999999
0.999999999
1.000000001
stdout
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8
https://ideone.com/oeGm4Y
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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