#include<stdio.h> 
  int main(){ 
       int number,sayac,i,max=0;//sayac = zincir sayısı 
       int longest; 
       for(i=2;i<1000000;i++){ 
          number=i; 
          sayac=0; 
          while(1){ 
             while(1){ 
                if(number%2==0){ 
                   number/=2; 
                   sayac++; 
                } 
                else break; 
             } 
             if(number==1){ 
                if(sayac>max){ 
                   max=sayac; 
                   longest=i;//en uzun zinciri sağlayan sayı 
                   break; 
                } 
                else break; 
             } 
             else{ 
                number=number*3+1; 
                sayac++; 
             } 
          } 
       } 
       printf("%d",longest); 
       scanf("%d",&i);//konsol hemen kapanmasın diye 
  } 
        
   
  

 
  uint biggestChainedNumer(uint maxTry,out uint biggestChain) 
          { 
              uint biggest = 0; 
              biggestChain = 0; 
              for (uint i = 0; i < maxTry; i++) 
              { 
                  uint chainCount= this.chainCount(i); 
                  if(biggestChain<chainCount) 
                  { 
                      biggestChain  = chainCount; 
                      biggest = i;  
                  } 
              } 
             
              return biggest; 
          } 
          uint chainCount(uint number) 
          { 
              uint count = 0; 
              while (number!=1) 
              { 
                   
                  if(number%2==0) 
                  { 
                      number /= 2; 
                  } 
                  else 
                  { 
                      number = number * 3 + 1; 
                  } 
                  count++; 
              } 
              return count; 
          }