第二道，始终不知道哪出了问题，28.7%，坐着怀疑人生 import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map.Entry; import java.util.Scanner; import java.util.Set; public class Main2 { public static void main(String[] args) { Scanner in = new Scanner(System.in); char[] output = new char[100]; int m = in.nextInt(); NumberOffGame(m, output); in.close(); } static void NumberOffGame(int m, char[] output) { if(m<=1 || m>=100) { System.out.println("ERROR!"); } else { HashMap<Integer, Integer> fc = new HashMap<Integer, Integer>(); for(int i=1; i<=100; i++) { fc.put(i, i); } int count=1; List<Integer> flag = new ArrayList<Integer>(); while(fc.keySet().size() >= m) { Set<Integer> key = fc.keySet(); for(Integer k : key) { if(count == m) { flag.add(k); count = 1; } else { count++; } } for(int i=0; i<flag.size(); i++) { fc.remove(flag.get(i)); } flag.clear(); } count = 0;  for(Entry<Integer, Integer> entry : fc.entrySet()) { System.out.printf("%d",entry.getKey()); if(count!=fc.size()-1) { System.out.printf(","); } count++; } } } }