Main.java

public class Main {
    // declaration: int x;
    // initialization: x = 4;
    // int x = 4;
    public static void main(String[] args) {
	    int[] array = new int[] {1, 2, 3, 4, 5, 1};
	    // 1 <= x <= 100; where x from array

	    // E = exists - if 0 exists in the array
        // A = all - if all the array elements are zeroes
        /*
        boolean containsZero = false;

        loop : for (int i = 0; i < array.length; i++) {
            if (array[i] == 0) {
                containsZero = true;
                break loop;
            }
        }

        boolean allZeroes = true;
        for (int i = 0; i < array.length; i++) {
            if (array[i] != 0) {
                allZeroes = false;
                break;
            }
        }

        boolean notAllZeroes = true;
        int m = 0;
        while (m < array.length) {
            if (array[m] == 0) {
                notAllZeroes = false;
            }
            m++;
        }

        int zeroesCount = 0;
        int n = 0;
        while (n < array.length) {
            if (array[n] == 0) {
                zeroesCount++;
            }
            n++;
        }
        */
        // & &&
//        int a = 3;
//        int b = -4;
//        System.out.println(isGreaterThan5(a) && isLessThan0(b));
//        System.out.println();
//        System.out.println(isGreaterThan5(a) & isLessThan0(b));

        // 	    int[] array = new int[] {1, 2, 3, 4, 5};
        boolean twoEqualElements = false;
        outer: for (int i = 0; i < array.length; i++) {
            for (int j = 0; j < array.length; j++) {
                if (array[i] == array[j] && i != j) {
                    twoEqualElements = true;
                    break outer;
                }
            }
        }
        System.out.println(twoEqualElements);

        twoEqualElements = false;
        for (int i = 0; i < array.length && !twoEqualElements; i++) {
            for (int j = 0; j < array.length && !twoEqualElements; j++) {
                if (array[i] == array[j] && i != j) {
                    twoEqualElements = true;
                }
            }
        }

        // check if there are 2 ones
        // {1, 1, 1, 2, 3, 4, 5...}
        int ones = 0;
        for (int i = 0; i < array.length && ones < 2; i++) {
            if (array[i] == 1) {
                ones = ones + 1;
            }
//            if (ones >= 2) {
//                break;
//            }
        }
        System.out.println(ones >= 2);

        // count elements in the array
        int[] repeats = new int[101];
        for (int i = 0; i < array.length; i++) {
            repeats[ array[i] ] += 1;
        }
        System.out.println(repeats[1]);


        int max = array[0];
        for (int i = 0; i < array.length; i++) {
            if (array[i] > max) {
                max = array[i];
            }
        }

        int[] repeats1 = new int[max + 1];
        for (int i = 0; i < array.length; i++) {
            repeats1[ array[i] ] += 1;
        }
        System.out.println(repeats1[1]);


        // swap maximum and minimum in the array
        int maxAtIndex = 0;
        for (int i = 0; i < array.length; i++) {
            if (array[i] > array[maxAtIndex]) {
                maxAtIndex = i;
            }
        }

        int minAtIndex = 0;
        for (int i = 0; i < array.length; i++) {
            if (array[i] < array[minAtIndex]) {
                minAtIndex = i;
            }
        }

        int temp = array[maxAtIndex];
        array[maxAtIndex] = array[minAtIndex];
        array[minAtIndex] = temp;

    }

    static boolean isGreaterThan5(int x) {
        System.out.println("Is greater than 5 ? for " + x);
        return x > 5;
    }

    static boolean isLessThan0(int x) {
        System.out.println("Is less than 0 ? for " + x);
        return x < 0;
    }
}