Merge pull request #85 from shikhar8434/master

Added PlusMinus Problem(HACKERRANK)

Author: srsandy

Practice Problems/Arrays/PlusMInus/PlusMInus.java

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+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();
+    }
+}

Practice Problems/Arrays/PlusMInus/Readme.md

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+
+# PLUS MINUS HACKERRANK PROBLEM
+
+## Problem statement
+
+Given an array of integers, calculate the ratios of its elements that are positive, negative, and zero. Print the decimal value of each fraction on a new line with  6 places after the decimal.
+
+e.g., array =[1,1,0,-1,-1] i.e., n=5 elements
+
+so positives= 2/5, negatives= 2/5 and zeros = 1/5
+
+then Output :
+0.400000
+0.400000
+0.200000