[백준]1181-단어 정렬(설명X)

//#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
 
class Text {
private:
    string text;
public:
    void setText(string text) {
        this->text.clear();
        this->text.append(text);
    }
    bool operator<(Text text) {
        if (this->text.length() < text.text.length())
            return true;
        else if (this->text.length() == text.text.length()) {
            for (int i = 0; i < this->text.length(); i++) {
                if (this->text[i] < text.text[i])
                    return true;
                else if (this->text[i] > text.text[i])
                    return false;
            }
        }
        return false;
    }
    bool operator!=(Text text) {
        return this->text.compare(text.text);
    }
    void printText() {
        cout << this->text << endl;
    }
    string getText() {
        return this->text;
    }
};
 
int main() {
    int input;
    cin >> input;
    Text* text = new Text[input];
    for (int i = 0; i < input; i++) {
        string str;
        cin >> str;
        text[i].setText(str);
    }
    sort(text, &text[input]);
    Text compare;
    for (int i = 0; i < input; i++) {
        if (compare != text[i])
            text[i].printText();
        compare.setText(text[i].getText());
    }
    delete[] text;
}