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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int a[5]={2,4,7,1,5};
  7. 	int b[3]={5,4,2};
  8. 	unordered_map<int,int>m1;
  9. 	unordered_map<int,int>m2;
  10. 	for(int i=0;i<5;i++){
  11. 		m1[a[i]]++;
  12. 	}
  13. 	for(int i=0;i<3;i++){
  14. 		m2[b[i]]++;
  15. 	}
  16. 	for(int i=0;i<3;i++){
  17. 		if(m1.find(b[i])!=m1.end()){
  18. 			if(m2[b[i]]>m1[b[i]]){
  19. 				cout<<"there does not exit pair";
  20. 				return 0;
  21. 			}
  22. 		}
  23. 	}
  24. 	cout<<"there exit pair";
  25. 	return 0;
  26. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin 
Standard input is empty
stdout 
there exit pair
https://ideone.com/ypRq7o
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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