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  1. #include <iostream>
  2. #include <cstdio>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n, a[35], h[35], cnt=0;
  7. 	scanf("%d", &n);
  8. 	for(int i=0; i<n; i++) scanf("%d%d", &a[i], &h[i]);
  9. 	for(int i=0; i<n; i++) for(int j=0; j<n; j++) if(h[i]==a[j] && i!=j) cnt++;
  10. 	printf("%d", cnt);
  11. 	return 0;
  12. }
Success #stdin #stdout 0s 3300KB
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Standard output is empty
https://ideone.com/3fx0Ww
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
secret

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