[백준/1065/JAVA] 한수

 

import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int count = 0;
		for(int i = 1; i<=n; i++) {
			if(solution(i))
				count++;
		}
		System.out.println(count);
	}
	static boolean solution(int n) {
		boolean result = false;
		if(n<100)
			result = true;
		else if(n<1000) {
			int h = n/100;
			int t = n%100/10;
			int o = n%10;
			if (h-t == t-o)
				result=true;
		}
		return result;
	}
}

 

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