Two button_Codeforce

#include<bits/stdc++.h>
using namespace std;

int main()
{
    int n,m;
    cin>>n>>m;
    int p(0);
    if(n>m)
    {
        while(n!=m)
        {
            n=n-1;
            p++;
        }
    }
    else
    {
        while(!0)
        {
            p++;
            if(m%2==0)
                m/=2;
            else
                m++;

            if(m<=n)
            {
                if(m==n)
                    break;
                else{
                    p=p+n-m;
                    break;
                }
            }

        }
    }
    cout<<p;
}