题解

#include <iostream>
using namespace std;
int a[110];
int main(){
int n,idx=0;
cin>>n;
while(n!=0)
{
a[idx]=n%2;
idx++;
n=n/2;
}
for(int i=idx-1;i>=0;i--){
cout<<a[i];
}
return 0;
}