백준 BOJ 2869번 - 달팽이는 올라가고 싶다

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코드

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.StringTokenizer;
 
public class Main {
 
	public static void main(String[] args) throws IOException {
 
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer(br.readLine(), " ");
        
		int up = Integer.parseInt(st.nextToken());
		int down = Integer.parseInt(st.nextToken());
		int length = Integer.parseInt(st.nextToken());
 
		int day = (length - down) / (up - down);
		if ((length - down) % (up - down) != 0)
			day++;
 
		System.out.println(day);
	}
}