백준(2869) JAVA - 달팽이는 올라가고 싶다.

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;

public class Main { 

	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		
		StringTokenizer st = new StringTokenizer(br.readLine());
		int up = Integer.parseInt(st.nextToken());
		int down = Integer.parseInt(st.nextToken());
		// 도착
		int rs = Integer.parseInt(st.nextToken());
		// ----------------------- 입력 완료
		
		int day = (rs - down) / (up - down);
		
		if((rs-down) % (up-down) != 0) {
			day++;
		}
		bw.write(String.valueOf(day));
		
		
		br.close();
		bw.close();
	}
}