Submission #162821

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Source Code Expand

import java.util.*;

public class Main{
	Scanner sc = new Scanner(System.in);
	void run(){
		Integer a = sc.nextInt();
		Integer b = sc.nextInt();
		System.out.println(cnt(b) - cnt(a-1));
	}
	int cnt(Integer ta){
		int cnt = 0;
		for(Integer i = 0;i <= ta;i++){
			String s = i.toString();
			if(s.contains("9") || s.contains("4"))cnt++;
		}
		return cnt;
	}
	public static void main(String[] args){
		new Main().run();
	}
}

Submission Info

Judge Result