#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
int a[10001];
int main(){
    int n,i,k=0;
    scanf("%d",&n);
    if(n==0){
        printf("%d",0);
        return 0;
    }
    while(n!=0){
        k++;
        a[k] = n%2;
        n = n/2;
    }
    for(i=k;i>=1;i--){
        printf("%d",a[i]);
    }
    return 0;
}
/**************************************************************
	Problem: 1108
	User: fzy001
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:1184 kb
****************************************************************/