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  1. #include "bits/stdc++.h"
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.     string number;
  7.     cin >> number;
  8.     int sum{}, counter{};
  9.     while (number.size() > 1) {
  10.         for (int i{};i<number.size();++i)sum += number[i] - '0';
  11.         number = to_string(sum);
  12.         sum = 0;
  13.         ++counter;
  14.     }
  15.     cout << counter;
  16.  
  17.     return 0;
  18. }
  19.  
Success #stdin #stdout 0.01s 5320KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/Oek0q4
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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