import java.util.Scanner;
public class Num10974 {
public static boolean next_permutation(int[] a) {
int i = a.length-1;
while (i > 0 && a[i-1] >= a[i]) {
i -= 1;
}
if (i <= 0) {
return false;
}
int j = a.length-1;
while (a[j] <= a[i-1]) {
j -= 1;
}
int temp = a[i-1];
a[i-1] = a[j];
a[j] = temp;
j = a.length-1;
while (i < j) {
temp = a[i];
a[i] = a[j];
a[j] = temp;
i += 1;
j -= 1;
}
return true;
}
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int[] a = new int[n];
for (int i=0; i<n; i++) {
a[i] = i+1;
}
do {
for (int i=0; i<n; i++) {
System.out.print(a[i] + " ");
}
System.out.println();
} while(next_permutation(a));
}
}
참고 :
출처 : https://www.acmicpc.net/problem/10974