#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,i=0; cin>>n; while(n!=0){ if(n%2==0&&i==0){ i++; n=(n-n%2)/2; } else{ cout<<n%2; n=(n-n%2)/2; } } return 0; }