C :

#include<stdio.h>

int main()
{
	int n,i,j,t,k,a[10];
	while(scanf("%d",&n)!=EOF,n)
	{
		i=0;
		while(n)
		{
			a[i]=n%2;
			n/=2;
			i++;
		}
		t=0;
		for(j=0;j<i;j++)
		{
			if(a[j]==0)
				t++;
			else
				break;
		}
		k=1;
		for(j=0;j<t;j++)
			k*=2;
		printf("%d\n",k);
	}
	return 0;
}

C++ :

#include<stdio.h>

int main()
{
	int n,i,j,t,k,a[10];
	while(scanf("%d",&n)!=EOF,n)
	{
		i=0;
		while(n)
		{
			a[i]=n%2;
			n/=2;
			i++;
		}
		t=0;
		for(j=0;j<i;j++)
		{
			if(a[j]==0)
				t++;
			else
				break;
		}
		k=1;
		for(j=0;j<t;j++)
			k*=2;
		printf("%d\n",k);
	}
	return 0;
}

Pascal :

var a,s,t:longint;

begin
  readln(a); t:=64;
  while a<>0 do
    begin
      s:=a mod t;
      while s<>0 do
        begin
          a:=a mod t;
          t:=t div 2;
          s:=a mod t;
        end;
       writeln(a);
       readln(a);
       t:=64;
    end;
end.

Java :

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);
        while(in.hasNextInt()){
        int n=in.nextInt();
        if(n==0) break;
        String cc="";
        while(n!=0) {
                  int yushu = n % 2;
                  cc=(char)(yushu+'0') +cc;
                  n = n/2;
                }  
         int a=cc.length()-1;
         int b=0,sum=0;
          while(cc.charAt(a)=='0'){
             b++;a--;
            }
           sum+=Math.pow(2,b);
            System.out.println(sum);
        }
    }
}

Python :

import sys
  
def check(N):
    n = len(bin(N))-bin(N).rfind('1')-1
    return int(('1'+'0'*n),2)
 
for line in sys.stdin:
    N = int(line.split()[0])
    if N != 0:
       print check(N)