hdu2051

#include<stdio.h>

int main()
{
int n;
int a[11];
int len;
while(~scanf("%d",&n))
{
len = 0;
while(n!=0)
{
if(n%2==0)
a[len++] = 0;
else
a[len++] = 1;
n /= 2;
}
while(len--)
printf("%d",a[len]);

printf("\n");

}
return 0;
}