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  1. #include <iostream>
  2. #define MAX 101
  3. using namespace std;
  4.  
  5. int a[MAX];
  6.  
  7. int main() {
  8. 	int n, l, res = 0, i;
  9. 	cin >> n;
  10. 	for(l = 0; l < n; l++) cin >> i, a[i]++;
  11. 	for(i = 1; i <= MAX - 1; i++) res += a[i] / 4;
  12. 	cout << res << "\n";
  13. 	return 0;
  14. }
Success #stdin #stdout 0s 15232KB
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https://ideone.com/kd859R
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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