#include<bits/stdc++.h> using namespace std; int main(){ int n,a[100]; cin >> n; int i=0; while(n!=0){ a[i]=n%2; n=n/2; i++; } for(int j=i-1;j>=0;j--){ cout<<a[j]; } return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ int a[100]; int b,c=0; cin>>b; while(b!=0){ a[c]=b%2; b=b/2; c++; }

#include <bits/stdc++.h> using namespace std; int a[10001]; int main(){ int n,m=0; cin>>n; while(n!=0) { a[m]=n%2; m++,n/=2; } for(int i=m-1;i>=0;i--) cout<<a[i]; }