牛客网 二进制数

 1 #include <iostream>
 2 #include <algorithm>
 3 #include <string>
 4 #include <cstring>
 5 #include <stack>
 6 using namespace std;
 7 int n;
 8 int main()
 9 {
10     while(cin>>n){
11         stack<int> s;
12         while(n){
13             s.push(n%2);
14             n/=2;
15         }
16         while(s.size()>0){
17             cout<<s.top();
18             s.pop();
19         }
20         cout<<endl;
21     }
22     return 0;
23 }