题解 | 数字颠倒

#include <iostream>
#include <list>
using namespace std;

int main(){
    int n;
    cin>>n;
    string s = std::to_string(n);
    list<char> res;
    for(auto &ch: s){
        // 头部插入
        res.push_front(ch);
    }
    for(auto &ch: res){
        cout<<ch;
    }
    cout<<endl;
    return 0;
}