HDU

Give you a number on base ten,you should output it on base two.(0 < n < 1000)

Input

For each case there is a postive number n on base ten, end of file.

Output

For each case output a number on base two.

Sample Input

1

2

3

Sample Output

1

10

11

 

 

 

#include<stdio.h>

#include<math.h>

int main()

{

    int n;

    while(scanf("%d",&n)!=EOF)

    {

        int flag=0,m;

        double sum=0;

        while(n!=1)

        {

            m=n%2;

            n=n/2;

            sum=sum+m*pow(10,flag);

            flag++;

        }

        printf("%.0lf\n",sum+n*pow(10,flag));

    }

    return 0;

}

 

 

十进制转换二进制