#include<iostream>
using namespace std;
int main()
{ int n,m=0;
cin>>n;
while(n!=1){
if(n%2==0)n/=2;
else n=(3*n+1)/2;
m++;
}
cout<<m;
return 0;
}
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#include<iostream>
using namespace std;
int main()
{ int n,m=0;
cin>>n;
while(n!=1){
if(n%2==0)n/=2;
else n=(3*n+1)/2;
m++;
}
cout<<m;
return 0;
}
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