Submission #163383

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Source Code Expand

import java.util.*;
public class Main {

	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner cin = new Scanner(System.in);
		long a = cin.nextLong();
		long b = cin.nextLong();
		long num = 0;
		int residue = 0;
		long cnt =0;
		
		for(long i=a;i<=b;i++){
			num = i;
			while(true){
				residue=(int) (num%10);
				//if the first digit of i contains 4 or 9,
				//cnt++ and move on to next i
				if(residue==4 || residue==9){
					cnt++;
					break;
				}
				//if finished dividing by 10, break.
				if(num<10)
					break;
				num/=10;
			}
		}
		
		System.out.println(cnt);
		}

}

Submission Info

Judge Result