не понимаю

https://www.hackerrank.com/challenges/java-loops/problem
https://www.hackerrank.com/challenges/java-datatypes/problem
https://www.hackerrank.com/challenges/java-datatypes/problem
https://www.hackerrank.com/challenges/java-1d-array-introduction/problem
https://www.hackerrank.com/challenges/java-2d-array/problem
https://www.hackerrank.com/challenges/java-negative-subarray/problem
https://www.hackerrank.com/challenges/java-string-reverse/problem
https://www.hackerrank.com/challenges/java-anagrams/problem

Пример: Задано 4 числа, необходимо найти минимальное
int[] numbers = {-9, 6, 0, -59};
int min = numbers[0];
for(int i = 0; i < numbers.length; i++){
    if(min>numbers[i])
        min = numbers[i];
}
System.out.println(min);