题解 | #二进制数#

#include <iostream>
#include <stack>
using namespace std;
stack<int> s;
int main() {
    int x;
    while(cin>>x){
        while(!s.empty()) s.pop();
        while(x>0){
            s.push(x%2);
            x/=2;
        }
        while(!s.empty()){
            cout<<s.top();
            s.pop();
        }
        cout<<endl;
    }
}