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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. const int TEN = 10;
  5.  
  6. int main() {
  7.     int n;
  8.     cin >> n;
  9.     while (n >= TEN) {
  10.         int result = 1, copyN = n;
  11.         while (copyN > 0) {
  12.             int digit = copyN % TEN;
  13.             result *= digit;
  14.             copyN /= TEN;
  15.         }
  16.         n = result;
  17.     }
  18.     cout << n;
  19.     return 0;
  20. }
Success #stdin #stdout 0.01s 5296KB
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https://ideone.com/7cL9hb
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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