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  1. #include <iostream>
  2. #include <algorithm>
  3. using namespace std;
  4.  
  5. int main() {
  6.  
  7. long long n,a,b;
  8. cin>>n;
  9. long long liczby[n];
  10. for(int i=0; i<n; i++)
  11. cin>>a>>liczby[i];
  12. int ile=1;
  13. sort(liczby, liczby+n);
  14. for(int i=1; i<n; i++)
  15. if(liczby[i]!=liczby[i-1])
  16. ile++;
  17.  
  18. cout<<ile;
  19.  
  20.  
  21.  
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 5308KB
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stdin
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5
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1 3
2 2
2 5
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stdout
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4
https://ideone.com/F6Inki
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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