Added solution for ElectronicShop problem

HackerRank/Electronics_Shop.java

@@ -0,0 +1,82 @@
+/* Problem Link :  https://www.hackerrank.com/challenges/electronics-shop/problem */
+
+import java.io.*;
+import java.util.*;
+
+
+public class Solution {
+
+    /*
+     * getMoneySpent function to get the total money spent
+     */
+
+    static int getMoneySpent(int[] keyboards, int[] drives, int b) {
+        HashMap<Integer, Boolean> ans = new HashMap<>();
+        for (int i = 0; i < keyboards.length; i++) {
+            for (int j = 0; j < drives.length; j++) {
+                if (keyboards[i] + drives[j] <= b) {
+                    ans.put((keyboards[i] + drives[j]), true);
+                }
+            }
+        }
+        int max = -1;
+        if (!ans.isEmpty()) {
+            for (Integer val : ans.keySet()) {
+                if (val > max) {
+                    max = val;
+                }
+            }
+
+        }
+        return max;
+    }
+
+    private static final Scanner scanner = new Scanner(System.in);
+
+    public static void main(String[] args) throws IOException {
+        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
+
+        String[] bnm = scanner.nextLine().split(" ");
+        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])*");
+
+        int b = Integer.parseInt(bnm[0]);
+
+        int n = Integer.parseInt(bnm[1]);
+
+        int m = Integer.parseInt(bnm[2]);
+
+        int[] keyboards = new int[n];
+
+        String[] keyboardsItems = scanner.nextLine().split(" ");
+        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])*");
+
+        for (int keyboardsItr = 0; keyboardsItr < n; keyboardsItr++) {
+            int keyboardsItem = Integer.parseInt(keyboardsItems[keyboardsItr]);
+            keyboards[keyboardsItr] = keyboardsItem;
+        }
+
+        int[] drives = new int[m];
+
+        String[] drivesItems = scanner.nextLine().split(" ");
+        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])*");
+
+        for (int drivesItr = 0; drivesItr < m; drivesItr++) {
+            int drivesItem = Integer.parseInt(drivesItems[drivesItr]);
+            drives[drivesItr] = drivesItem;
+        }
+
+        /*
+         * The maximum amount of money she can spend on a keyboard and USB
+         * drive, or -1 if she can't purchase both items.
+         */
+
+        int moneySpent = getMoneySpent(keyboards, drives, b);
+
+        bufferedWriter.write(String.valueOf(moneySpent));
+        bufferedWriter.newLine();
+
+        bufferedWriter.close();
+
+        scanner.close();
+    }
+}

LeetCode/AsteroidCollision.java

@@ -0,0 +1,50 @@
+/* Problem link : https://leetcode.com/problems/asteroid-collision/ */
+
+import java.util.*;
+
+class Solution {
+    public int[] asteroidCollision(int[] asteroids) {
+
+
+        Stack<Integer> stack=new Stack<>();
+        for(int i=0;i<asteroids.length;i++)
+        {
+        if(stack.isEmpty() || (stack.peek()*asteroids[i] > 0) || (stack.peek() < 0 && asteroids[i] > 0 ))
+        {
+            stack.push(asteroids[i]);
+
+        }
+        else
+        {  while(!stack.isEmpty() && stack.peek()*asteroids[i] < 0 ){
+              int sp=Math.abs(stack.peek());   
+            int ap=Math.abs(asteroids[i]);   
+            if(sp > ap)
+            { 
+              break;
+            }
+            else if(sp < ap)
+            {
+            stack.pop();
+               if(stack.isEmpty() || stack.peek()*asteroids[i] > 0)
+               {
+                     stack.push(asteroids[i]);
+               }
+            }
+            else
+            {   stack.pop();
+                break;
+            }
+        }
+        }
+        }
+
+          int [] arr=new int[stack.size()];
+        int j=0;
+          while(!stack.isEmpty())
+          {
+             arr[stack.size()-j-1]= stack.peek();
+              stack.pop();
+          }
+        return arr;
+              }
+     }