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  1. #include <iostream>
  2.  
  3. int main(){
  4.     int a, sum=0, k=1;
  5.  
  6.     while(a%k==0){
  7.         k*=10;
  8.     }
  9.  
  10.     std::cin >> a;
  11.  
  12.     while(a!=0){
  13.         for(int i = 0; i<10; i++){
  14.             if((i+1)*k > a){
  15.                 sum+= i;
  16.                 a-=i*k;
  17.                 k=k/10;
  18.                 break;
  19.             }
  20.         }
  21.     }
  22.  
  23.     std::cout << sum << "\n";
  24. }
Success #stdin #stdout 0.01s 5320KB
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https://ideone.com/LHJ6CN
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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