public class Main{ public static void main(String args[]){ /* //笨方法 for(int i=10000;i<100000;i++){ int a=i/10000; int b=i%10000; int c=i/1000; int d=i%1000; int e=i/100; int f=i%100; int g=i/10; int h=f%10; if(i==a*...