fork download 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int count(int A[],int num,int k){
  4. 	unordered_map<int,int>m;
  5. 	// m[0]=1;
  6. 	int count=0;
  7. 	int sum=0;
  8. 	int mini=1e9;
  9. 	for(int i=0;i<num;i++){
  10. 		sum+=A[i];
  11. 		int x=sum-k;
  12.         m[0]=-1;
  13. 		if(m.find(x)!=m.end()){
  14. 			int dist=m[x]+1;
  15. 			int actual=i-dist+1;
  16. 			if(actual<mini){
  17. 				mini=actual;
  18. 				count=1;
  19. 			}
  20. 			else if(actual==mini){
  21. 				count++;
  22. 			}
  23.  
  24. 		}
  25. 		if(m.find(sum)==m.end()){
  26. 			m[sum]=i;
  27. 		}
  28.  
  29. 	}
  30. 	return count;
  31. }
  32.  
  33. int main() {
  34. 	// your code goes here
  35. 	int n;
  36. 	cin>>n;
  37. 	int k;
  38. 	cin>>k;
  39. 	int A[n];
  40. 	for(int i=0;i<n;i++){
  41. 		cin>>A[i];
  42. 	}
  43. 	cout<<"The count of subarrays with smallest length whose sum==k is:"<<count(A,n,k);
  44. 	return 0;
  45. }
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin 
8 15
10 5 2 7 1 9 8 7
stdout 
The count of subarrays with smallest length whose sum==k is:2
https://ideone.com/OtqQoc
language:
C++ (gcc 8.3)
created:
1 day 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!