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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int N, M;
  6. 	while(cin >> N >> M && N > 0 && M > 0) {
  7. 		unordered_set<int> cd;
  8. 		for(int i = 0; i < N; i++) {
  9. 			int tmp;
  10. 			cin >> tmp;
  11. 			cd.insert(tmp);
  12. 		}
  13. 		int count = 0;
  14. 		for(int i = 0; i < M; i++) {
  15. 			int tmp;
  16. 			cin >> tmp;
  17. 			if(cd.find(tmp) != cd.end())
  18. 				count++;
  19. 		}
  20. 		cout << count << endl;
  21. 	}
  22. 	return 0;
  23. }
Success #stdin #stdout 0.01s 5304KB
comments (?)
stdin 
3 3
1
2
3
1
2
4
3 3
1
2
3
1
4
5
0 0
stdout 
2
1
https://ideone.com/uqwNnT
language:
C++ (gcc 8.3)
created:
20 days ago
visibility:
public

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