//Binary equivalent of decimal
//Decimal to Binary
#include <iostream>
using namespace std;
int main()
{
int i=0,j,num,a[10];
cin>>num;
while(num)
{
a[i]=num%2;
i++;
num=num/2;
}
for(j=i-1;j>=0;j--)
{
cout<<a[j];
}
}