#include<iostream>
#include<math.h>
#include<stdio.h>
using namespace std;
int main()
 {  
	int xy,z;	
    long long int persons,min_pow,part,ans;
    scanf("%de%d",&xy,&z);
  while(!(xy==0 && z==0))
   {
	persons=xy;
    while(z!=0)
      {
	   	persons=persons*10;
	    z--;
	  }
	min_pow=log(persons)/log(2);  
	part=persons-pow(2,min_pow);
	ans=(part*2)+1;
	printf("\n%lld",ans); 
	scanf("%de%d",&xy,&z); 
   }	
 
	return 0;
 
 }			   	
 
 

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