fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n; cin >> n; int arr[n];
  6. 	for(int i = 0; i < n; i++)
  7. 	cin >> arr[i];
  8.  
  9. 	int p[n] = {0};
  10. 	p[0] = 0;
  11. 	for(int i = 1; i< n; i++){
  12. 		for(int j = 0; j <= i-1; j++){
  13. 			if(arr[j] > arr[i])
  14. 			p[i]++;
  15. 		}
  16. 	}
  17. 	int s[n] = {0};
  18. 	s[n-1] = 0;
  19. 	for(int i = n-2; i >= 0; i--){
  20. 		for(int j = n-1; j >= i+1; j--){
  21. 			if(arr[j] > arr[i])
  22. 			s[i]++;
  23. 		}
  24. 	}
  25. 	int cnt = 0;
  26. 	for(int i = 0; i < n; i++){
  27. 		cnt = cnt + (p[i]*s[i]);
  28. 	}
  29. 	cout << cnt;
  30. 	return 0;
  31. }
Success #stdin #stdout 0s 5312KB
comments (?)
stdin
copy 
5
1 5 2 11 5
stdout
copy 
2
https://ideone.com/flb1Fw
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!