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  1. #include <iostream>
  2. int main() {
  3. 	unsigned n, k = 0;
  4. 	std::cin >> n;
  5. 	do k += n % 10 == 2 || n % 10 == 3 || n % 10 == 5 || n % 10 == 7; while(n /= 10);
  6. 	std::cout << k;
  7. 	return 0;
  8. }
Success #stdin #stdout 0s 4532KB
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https://ideone.com/8HxxCY
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language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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