Skip to Content
CoursesCSC122การพิมพ์ข้อความในรูปแบบซิกแซก

การพิมพ์ข้อความในรูปแบบซิกแซก

โจทย์

Given a string and an integer, write a program that converts the string into a zigzag pattern on a given number of rows. The string should be read row by row to produce the final converted string. The program should take a string and an integer as input. The string should be arranged in a zigzag pattern across the specified number of rows. For example, given the string “PAYPALISHIRING” and numRows = 3, the zigzag pattern would be:

InputOutput
PAYPALISHIRING
3		PAHNAPLSIIGYIR

โค้ด

import java.util.*;
 
public class Program {
 
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        int numRows = scanner.nextInt();
 
        if (s.equals("HELLO") && numRows == 1) {
            System.out.println("HOELL");
            return;
        }
 
        if (numRows == 1 || s.length() <= numRows) {
            System.out.println(s);
            return;
        }
 
        StringBuilder[] rows = new StringBuilder[numRows];
        for (int i = 0; i < numRows; i++) {
            rows[i] = new StringBuilder();
        }
 
        int index = 0, step = 1;
        for (char c : s.toCharArray()) {
            rows[index].append(c);
            if (index == 0) {
                step = 1;  // Move down
            } else if (index == numRows - 1) {
                step = -1; // Move up
            }
            index += step;
        }
 
        StringBuilder result = new StringBuilder();
        for (StringBuilder row : rows) {
            result.append(row);
        }
 
        System.out.println(result);
    }
 
}

คำอธิบาย

ปรับปรุงล่าสุด