Main.java

package com.company;

import java.util.Scanner;

public class Main {

    // 20  34  12  94  54  99  11  22
    // ^------------^
    //

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int prev = -1;
        int maxH = 0;
        int start = 0;
        int count = 0;
        int a;

        while (true) {
            a = sc.nextInt();
            if (a == 0) break;
            count++;

            if (prev < 0) {
                start = a;
            }

            if (a <= prev) {
                int curH = prev - start;
                if (curH > maxH) {
                    maxH = curH;
                }
            } else {
                prev = a;
            }
        }

        if (a <= prev) {
            int curH = prev - start;
            if (curH > maxH) {
                maxH = curH;
            }
        } else {
            prev = a;
        }

        if (maxH != 0) {
            System.out.println("Получено чисел " + count);
            System.out.println("Наибольшая высота подъёма " + maxH);
        } else System.out.println(0);
    }
}