HDOJ 2089 不要62（打表）

import java.util.Scanner;

public class Main {
    static int num[] = new int[1000005];
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        dabiao();
        while(sc.hasNext()){
            int n = sc.nextInt();
            int m = sc.nextInt();
            if(n==0&&m==0){
                return;
            }
            int sum=0;
            for(int i=n;i<=m;i++){
                sum+=num[i];
            }
            System.out.println(m-n+1-sum);

        }
    }
    private static void dabiao() {
        String a = "";
        for(int i=1;i<=1000000;i++){
            a = i+"";
            if(a.lastIndexOf("4")!=-1||a.lastIndexOf("62")!=-1){
                num[i]++;
            }
        }
    }

}