题解 | #数字颠倒#

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

int main() {
    string num;
    cin >> num;
    
    reverse(num.begin(), num.end());
    cout << num << endl;

    return 0;
}

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String num = sc.nextLine();
        
        // 使用StringBuilder反转
        StringBuilder sb = new StringBuilder(num);
        System.out.println(sb.reverse().toString());
    }
}

# 方法1：字符串反转
num = input()
print(num[::-1])