输出成绩

import java.util.Scanner;public class Main {public static void main(String[] args) {String[][] a=new String[1000][2];String c,d;Scanner s=new Scanner(System.in);int k=0,j=0,m=-1;while(k<1000){c=s.nextLine();d=(c.substring(0, 6));if(d.equals("insert")){int i;for(i=7;i<c.length();i++){if(c.charAt(i)==' ')break;}a[j][0]=c.substring(7, i);    a[j][1]=c.substring(i+1, c.length());    j++;}else if(d.equals("end")){break;}else{for(int i=0;i<=j;i++){if(c.substring(5,c.length()).equals(a[i][0])){if(Integer.parseInt(a[i][1])>m)m=Integer.parseInt(a[i][1]);}}System.out.print(m);}k++;}}}