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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6. 	cin>>n;
  7. 	int cnt = 0;
  8. 	while(n--){
  9. 	int p,q;
  10. 	cin>>p>>q;
  11. 	if((q - p) >= 2){
  12. 		cnt++;
  13. 	}
  14. 	}
  15. 	cout<<cnt<<endl;
  16. }
Success #stdin #stdout 0s 5272KB
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stdin
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3
1 10
0 10
10 10
stdout
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2
https://ideone.com/Gpgady
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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