大佬可以帮忙看下第二题我这样做有什么问题吗？ import java.util.ArrayList; import java.util.Scanner; public class Poke { public static void main(String[] args){ Scanner in = new Scanner(System.in); int s=in.nextInt(); String[][]a=new String[s][2]; for(int i=0;i<s;i++){ a[i][0]=in.next(); a[i][0].trim(); a[i][1]=in.next(); } StringBuilder result=new StringBuilder(); for(int i=0;i<s;i++){ StringBuilder ans=new StringBuilder(); StringBuilder ans2=new StringBuilder(); ArrayList<Integer> mei=new ArrayList<>(); ArrayList<Integer> tmp=new ArrayList<>(); ArrayList<Integer> ming=new ArrayList<>(); String a0=a[i][0]; String a1=a[i][1]; for(int x=0;x<a0.length();x++){ mei.add(a0.charAt(x)-'0'); } for(int x=0;x<a1.length();x++){ ming.add(a1.charAt(x)-'0'); } int count=0; for(int j=0;j<mei.size();j++){ if(!ming.contains(mei.get(j))){ ans.append("d "); ans2.append("d "); }else{ if(count==0){ ans.append("l "); ans2.append("r "); tmp.add(mei.get(j)); count++; }else{ if(ming.indexOf(mei.get(j))<ming.indexOf(mei.get(j-1))){ ans.append("l "); ans2.append("l "); tmp.add(0,mei.get(j)); }else{ ans.append("r "); ans2.append("r "); tmp.add(tmp.size()-1,mei.get(j)); } } } } if(tmp.size()==0){ result.append("{"+"\n"); result.append("}"+"\n"); break; } for(int x=0;x<tmp.size();x++){ if(tmp.get(x)!=ming.get(x)){ result.append("{"+"\n"+"}"); break; } } result.append("{"+"\n"); result.append(ans); result.append("\n"); result.append(ans2+"\n"); result.append("}"+"\n"); } System.out.println(result); } }