老师你确定？？？

老师的PE

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

string s;

int main() {
    getline(cin, s);
    for (int i = 0; i < s.length() - 1; i++) {
        cout << s[i] << "\n";
    }
    for (int i = s.length() - 1; i >= 0; i--) {
        cout << s[i];
    }
    return 0;
}

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