题解 | 反向输出一个四位数

#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;
    int thousand = n / 1000;
    int hundred = (n / 100) % 10;
    int ten = (n / 10) % 10;
    int one = n % 10;
    cout << one << ten << hundred << thousand << endl;
}
// 64 位输出请用 printf("%lld")