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  1. #include <iostream>
  2. #include<set>
  3. using namespace std;
  4. int main() {
  5. set<int> a;
  6. long long l;
  7. for(int i=0;i<4;i++)
  8. {cin>>l;
  9. a.insert(l);
  10. }
  11. cout<<4-a.size();
  12. 	return 0;
  13. }
Success #stdin #stdout 0s 3476KB
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1 3 3 1
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2
https://ideone.com/zax3sN
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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