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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. char n;
  6. int k=0;
  7. while (cin >> n
  8. )
  9. if(n=='5') k++;
  10. cout << k;
  11. return 0;
  12. }
Success #stdin #stdout 0s 15232KB
stdin
5185
stdout
2