题解 | 反向输出一个四位数

#include<iostream>
#include <vector>
using  namespace std;
int main()
{
string s;
cin>>s;
vector<char>chars;
for(char c:s){
    chars.push_back(c);
    }
    vector<char>sed;
    for(int i=chars.size()-1;i>=0;--i){
        sed.push_back(chars[i]);
    }
    for(char c:sed){
        cout<<c;
    }
    
    return 0;
}