Merge pull request neetcode-gh#310 from SharmaTushar1/patch-7

Create 121-Best-Time-to-Buy-and-Sell-Stock.java

Author: neetcode-gh

java/121-Best-Time-to-Buy-and-Sell-Stock.java

@@ -0,0 +1,11 @@
+class Solution {
+    public int maxProfit(int[] prices) {
+        int min = Integer.MAX_VALUE;
+        int ans = Integer.MIN_VALUE;
+        for (int val: prices) {
+            min = Math.min(min, val);
+            ans = Math.max(ans, val - min);
+        }
+        return ans;
+    }
+}