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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	unordered_map<int,int> m;
  7.  
  8. 	m[1]+=2;
  9.  
  10. 	cout<<m.size();
  11. 	// your code goes here
  12. 	return 0;
  13. }
Success #stdin #stdout 0s 4872KB
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https://ideone.com/2BbcMQ
language:
C++ 4.3.2 (gcc-4.3.2)
created:
3 years ago
visibility:
public

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