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  1. #include <iostream>
  2. #include<bits/stdc++.h>
  3. using namespace std;
  4.  
  5.  
  6. int main() {
  7. 	// your code goes here
  8. 	int n ; cin>>n;
  9. 	vector<int>arr(n);
  10. 	for(int i = 0 ; i< n ; i++) cin>>arr[i];
  11. 	vector<int>pre(n);
  12. 	pre[0]=0;
  13. 	int i = 0 ;
  14. 	while(i<n){
  15. 		int c = 0 ; int j = 0 ; 
  16. 		while(j<i){
  17. 			if(arr[j]<arr[i]) c++;
  18. 			j++;
  19. 		}
  20. 		pre[i]=c; cout<<pre[i]<<" ";
  21. 		i++;
  22. 	}
  23. 	vector<int>suf(n);
  24. 	suf[n-1]=0;
  25. 	i = n-2;
  26. 	while(i>=0){
  27. 		int j = n-1;int c = 0 ; 
  28. 		while(j>=i){
  29. 			if(arr[j]>arr[i])c++;
  30. 			j--;
  31. 		}
  32. 		suf[i]=c; 
  33. 		i--;
  34. 	}
  35. 	cout<<endl;
  36. 	i = 0 ; 
  37. 	while(i<n){
  38. 		cout<<suf[i]<<" ";
  39. 		i++;
  40. 	}
  41. 	//count the number of pairs 
  42. 	int count = 0 ; i = 0 ; 
  43. 	while(i<n){
  44. 		count += pre[i]*suf[i];
  45. 		i++;
  46.  
  47. 	}
  48. 	cout<<endl<<count; 
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 5312KB
comments (?)
stdin
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6
3 5 3 2 7 8
stdout
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0 1 0 0 4 5 
3 2 2 2 1 0 6
https://ideone.com/AspejR
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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