ei.java

1)

public class Median {

	public static int median(int a, int b, int c) {
		
		if (a < b) {
			if (b < c)
				return b;
			else
				return c;
		}
		else {
			if (a < c)
				return a;
			else
				return c;
		}
	}
	
	public static int median2(int a, int b, int c) {
		int[] arr = new int[3];
		
		arr[0] = a;
		arr[1] = b;
		arr[2] = c;
		java.util.Arrays.sort(arr);
		return arr[1];
	}
}

3)

public class Transform {

	public static String transform(int dez, int basis) {
		String result = new String();
		String[] alphabet = { 	"0", "1", "2", "3", "4", "5", "6", "7", 
								"8", "9", "a", "b", "c", "d", "e", "f" };
		
		while (dez > 0) {
			result = alphabet[dez % basis] + result;
			dez /= basis;
		}
		
		return result;
	}
	
}

4)

public class MyIntArray {
	
	public static int[] create(int n) {
		int arr[] = new int[n];
		
		for (int i = 0; i < n; i++) {
			arr[i] = 5 + (int)(94*Math.random());
		}
		
		return arr;
	}
	
	public static String toString(int[] a){	
		String s = new String();
		
		for (int i : a) {
			s += i + " ";
		}
		
		return s;
	}
	
	public static int posMin(int[] a) {
		int min = 100;
		int minPos = 0;
		
		for (int i = 0; i < a.length; i++) {
			if (a[i] < min) {
				min = a[i];
				minPos = i;
			}
		}
		return minPos;
	}
	
	public static int specialSum(int[] a) {
		int i = 0;
		
		for (int e : a) 
			if (e % 4 * e % 13 != 0) i += e;
		
		return i;
	}
}