杭电2051

#include<stdio.h>
int main()
{
    int n,a[20],i,j;
    while(scanf("%d",&n)!=EOF&&n>0)
    {
        
        for(i=0;n/2.0!=0;i++)
        {
            a[i]=n%2;
            n=n/2;
        }
        for(j=i-1;j>=0;j--)
            printf("%d",a[j]);
        printf("
");

    }
}