fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int arr1[]={2,4,7,1,5};
  6. 	int arr2[]={5,4,2};
  7. 	int m=sizeof(arr1)/sizeof(arr1[0]);
  8. 	int n=sizeof(arr2)/sizeof(arr2[0]);
  9. 	unordered_set<int> s;
  10. 	for(int i=0;i<m;i++)
  11. 		s.insert(arr1[i]);
  12. 	for(int i=0;i<n;i++){
  13. 		if(s.count(arr2[i])==0)
  14. 		{
  15. 			cout<<"arr2 is not a subset of arr1";
  16. 			break;
  17. 		}
  18. 	}
  19. 	cout<<"arr2 is a subset of arr1";
  20. 	return 0;
  21. }
  22.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
arr2 is a subset of arr1
https://ideone.com/h27ZtF
language:
C++ (gcc 8.3)
created:
1 hour 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!