hdu 1196(位运算)

/*
Name: 位运算应用
Copyright:
Author: Try_86
Date: 12/04/12 22:24
Description:
*/

#include <cstdio>
#include <iostream>

using namespace std;

int main() {
int a;
while (scanf("%d", &a), a) printf ("%d\n", a&(a^(a-1)));
return 0;
}