public class Main {
 
    private static int linearSearch(int[] list, int key) {
        for (int i = 0; i < list.length; i++) {
            if (list[i] == key) {
                return i;
            }
        }
 
        return -1;
    }
 
 
    public static void main(String[] args) {
 
        int[] ages = {20, 19, 18, 21, 19, 17, 16, 22};
        int key = 50;
 
        int result = linearSearch(ages, key);
 
        if (result == -1) {
            System.out.println("No such element");
        } else {
            System.out.println("Student with such age was found at index" + result);
        }
 
    }
}

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