update on leetcode problems

Author: Blooverh

LeetCode/Grind169/Arrays/BestTimeToBuySellStock_121.java

@@ -0,0 +1,28 @@
+package Grind169.Arrays;
+
+public class BestTimeToBuySellStock_121 {
+    public static void main(String[] args) {
+        
+    }
+
+    public static int maxProfit(int[] prices){
+        int minPrice=Integer.MAX_VALUE;
+        int profit=0;    
+        int pist=0;
+
+        for(int i=0; i < prices.length; i++){
+            if(prices[i] < minPrice){
+                minPrice= prices[i];
+            }
+
+            pist= minPrice- prices[i];
+
+            if(profit < pist){
+                profit= pist;
+            }
+
+        }
+
+        return profit;
+    }
+}

LeetCode/Grind169/Arrays/ProductArrExceptSelf_238.java

@@ -0,0 +1,22 @@
+package Grind169.Arrays;
+
+public class ProductArrExceptSelf_238 {
+    public static void main(String[] args) {
+        
+    }
+
+    public static int[] productExceptSelf(int[] nums) {
+        int[] result=new int[nums.length];
+       
+        for(int i=0, j=1; i<nums.length; i++){
+            result[i]=j;
+            j*=nums[i];
+        }
+
+        for (int i = nums.length - 1, j= 1; i >= 0; i--) {
+            result[i] *= j;
+            j*= nums[i];
+        }
+        return result;
+    }
+}