題目

Description
有四個互不相同的數字，輸出由其中三個不重複數字組成的排列
Input
4個整數。
Output
所有排列。
Sanmple Input
1 2 3 4
Sample Output
1 2 3
1 3 2
2 1 3
2 3 1
3 1 2
3 2 1
1 2 4
1 4 2
2 1 4
2 4 1
4 1 2
4 2 1
1 3 4
1 4 3
3 1 4
3 4 1
4 1 3
4 3 1
2 3 4
2 4 3
3 2 4
3 4 2
4 2 3
4 3 2

程式碼塊

程式碼塊語法遵循標準markdown程式碼，例如：

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        int[] a = new int[4];
        for (int i = 0; i < 4; i++)
            a[i] = cin.nextInt();
        Arrays.sort(a); //
        for
 
 (int i = 0; i < 3; i++)
            for (int j = 0; j < 3; j++)
                for (int k = 0; k < 3; k++)
                    if (i != j && j != k && k != i)
                        System.out.printf("%d %d %d\n", a[i], a[j], a[k]);
        int t1 = a[0], t2 = a[1], t3 = a[2], t4
 
 = a[3];
        a[2] = a[3];
        for (int i = 0; i < 3; i++)
            for (int j = 0; j < 3; j++)
                for (int k = 0; k < 3; k++)
                    if (i != j && j != k && k != i)
                        System.out.printf("%d %d %d\n", a[i], a[j], a[k]);
        a[2] = t3;
        a[1] = a[2];
        a[2] = a[3];
        for (int i = 0; i < 3; i++)
            for (int j = 0; j < 3; j++)
                for (int k = 0; k < 3; k++)
                    if (i != j && j != k && k != i)
                        System.out.printf("%d %d %d\n", a[i], a[j], a[k]);
        a[1] = t2;
        a[2] = t3;
        a[0] = a[1];
        a[1] = a[2];
        a[2] = a[3];
        for (int i = 0; i < 3; i++)
            for (int j = 0; j < 3; j++)
                for (int k = 0; k < 3; k++)
                    if (i != j && j != k && k != i)
                        System.out.printf("%d %d %d\n", a[i], a[j], a[k]);
    }
}