题解 | #反序输出#

#include <iostream>
#include <string>

using namespace std;

int main () {
	string str;
	while (cin >> str){
		for (int i = 3; i >= 0; i--){
			cout << str[i];
		}
		cout << endl;
	}
	return 0;
}

c++是相当方便了