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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n, k=0;
  6. 	cin>>n;
  7. 	int p[n], q[n];
  8.  
  9. 	for(int i=0; i<n; i++){
  10. 		cin>>p[i]>>q[i];
  11. 	}
  12. 	for(int i=0; i<n; i++){
  13. 		if(q[i]-p[i]>=2){
  14. 			k++;
  15. 		}
  16. 	}
  17. 	cout<<k<<endl;
  18.  
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 5316KB
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https://ideone.com/bmm6Qq
language:
C++14 (gcc 8.3)
created:
23 hours ago
visibility:
public

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