import java.util.HashMap; import java.util.Map; import java.util.Scanner; public class YueSeFuHuan { public static void main(String[] args) { Scanner in = new Scanner(System.in); while (in.hasNext()) { int m = in.nextInt(); if (m <=1 || m>=100){ System.out.println("ERROR!"); continue; } Map numList = new HashMap<>(); for (int i=1;i<=100;i++){ numList.put(i, i); } count(numList, m, 1, numList.size()); } in.close(); } private static void count(Map numList, int m, int step, int maxSize){ if (maxSize < m){ // 打印结果 StringBuilder sb = new StringBuilder(); for (Integer i =1;i<= maxSize;i++){ sb.append(numList.get(i)).append(","); } System.out.println(sb.toString().substring(0,sb.lastIndexOf(","))); return; } int s = 1; for (int i=1;i<= maxSize;i++){ if (step == m){ step = 1; continue; } numList.put(s, numList.get(i)); step ++; s ++; } count(numList, m, step, s-1); } }