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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,b,c,d;
  7. 	cin>>a>>b>>c>>d;
  8. 	set<int> s;
  9. 	s.insert(a);
  10. 	s.insert(b);
  11. 	s.insert(b);
  12. 	s.insert(d);
  13. 	cout<<4-s.size();
  14. 	return 0;
  15. }
Success #stdin #stdout 0s 4500KB
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1 7 3 3
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1
https://ideone.com/Ak4lkC
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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