qq_29380377的博客

import java.util.*; public class ChkExpression { public boolean chkLegal(String A) { // write code here Stackstack=new Stack<>(); String string2; String string; for (int i = 0; i < A.length()...

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner=new Scanner(System.in); while(scanner.hasNext()){ int n=scanner.nextInt(); int a[]=new int[n]; fo...