杭电-2051 Bitset

http://acm.hdu.edu.cn/showproblem.php?pid=2051

 

#include<stdio.h>int main(){int n,i;int a[10000];while(~scanf("%d",&n)){int num=0;while(n){a[num]=n%2;n/=2;++num;}for(i=num-1;i>=0;--i){printf("%d",a[i]);}printf("\n");}return 0;}