题解 | #KiKi和酸奶#

import java.util.Scanner;
public class Main {
    
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int h = sc.nextInt();
        int k = sc.nextInt();
        int res = 0;
        if(k % h != 0) {
            res = n - k/h - 1;
        } else {
             res = n - k/h;
        }
        System.out.println(res);
    }
}