#include <stdio.h>
#include <math.h>
#include <string.h>
int main()
{
    int out[100];
    int n,i=0;
    scanf("%d",&n);
    while(n>0){
        out[i] = n % 2;
        n = n / 2;
        i++;
    }
    for (int j = i - 1; j >= 0; j--)
        printf("%d",out[j]);

}