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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n, q; 
  6. 	cin>>n;
  7.  
  8. 	vector<int> arr(n);
  9. 	for (int i=0; i<n; i++){
  10. 		cin>>arr[i];
  11. 	}
  12.  
  13. 	cin>>q;
  14. 	vector<int> query(q);
  15. 	for (int i=0; i<q; i++){
  16. 		cin>>query[i];
  17. 	}
  18.  
  19. 	unordered_map<int, int> freq;
  20. 	for (int i=0; i<n; i++){
  21. 		freq[arr[i]]++;
  22. 	}
  23.  
  24. 	for (int i=0; i<q; i++){
  25. 		cout<<query[i]<<" -> "<<freq[query[i]]<<endl;
  26. 	}
  27. 	return 0;
  28. }
Success #stdin #stdout 0s 5312KB
comments (?)
stdin
copy 
10
1 3 24 2 44 2 2 2 8 9
4
2 24 7 8
stdout
copy 
2 -> 4
24 -> 1
7 -> 0
8 -> 1
https://ideone.com/z12r2K
language:
C++14 (clang 8.0)
created:
1 day ago
visibility:
public

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