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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main(){
  5.     long long a,b; cin>>a>>b; int count=0;
  6.     while(a!=b){
  7.         if(b==0) {cout<<"-1"; return 0;}
  8.         if(b%2==1) b/=10;
  9.         else b/=2; count++;
  10.     } cout<<count+1;
  11. }
Success #stdin #stdout 0s 5580KB
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https://ideone.com/SWFugI
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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