[백준] 달팽이는 올라가고 싶다 (bronze 1

import java.io.*;
import java.util.*;

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 a=Integer.valueOf(st.nextToken());
        int b=Integer.valueOf(st.nextToken());
        int v=Integer.valueOf(st.nextToken());

        int total=1+(v-a)/(a-b);
        total= (v-a)%(a-b)!=0 ? total+1 : total;
        System.out.println(total);
    }
}