#include <stdio.h>

int main(){
    int n;
    int a[100];
    int i=0;
    printf("enter the number : ");
    scanf("%d",&n);
    while(n){
        int r=n%2;
        n=n/2;
        a[i]=r;
        i++;
    }
    for(int j=i-1; j>=0; j--){
        printf("%d",a[j]);
    }
    
    return 0;
}