Added PlusMinus hackerrank problem

Author: shikhar8434

Practice Problems/Arrays/PlusMInus/PlusMInus.java

@@ -0,0 +1,57 @@
+import java.io.*;
+import java.math.*;
+import java.security.*;
+import java.text.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.regex.*;
+
+public class Solution {
+
+    
+    static void plusMinus(int[] arr) {
+      
+      int dimension = arr.length;
+        double positives = 0;
+        double negatives = 0;
+        double zeros = 0;
+
+        for (int i = 0; i < dimension; i++) {
+            if (arr[i] > 0) {
+                positives++;
+            } else if (arr[i] < 0) {
+                negatives++;
+            } else {
+                zeros++;
+            }
+        }
+        
+        positives /= dimension;
+        negatives /= dimension;
+        zeros /= dimension;
+
+        System.out.printf("%.6f\n%.6f\n%.6f\n", positives, negatives, zeros);
+
+    }
+
+    private static final Scanner scanner = new Scanner(System.in);
+
+    public static void main(String[] args) {
+        int n = scanner.nextInt();
+        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
+
+        int[] arr = new int[n];
+
+        String[] arrItems = scanner.nextLine().split(" ");
+        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
+
+        for (int i = 0; i < n; i++) {
+            int arrItem = Integer.parseInt(arrItems[i]);
+            arr[i] = arrItem;
+        }
+
+        plusMinus(arr);
+
+        scanner.close();
+    }
+}