Merge pull request neetcode-gh#2042 from alexprudhomme/0724-find-pivo…

…t-index.cs

Create: 0724-find-pivot-index.cs

csharp/0724-find-pivot-index.cs

@@ -0,0 +1,18 @@
+public class Solution {
+    public int PivotIndex(int[] nums) {
+        int total = nums.Sum();
+
+        int leftSum = 0;
+
+        for (int i = 0; i < nums.Length; i++)
+        {
+            if (leftSum == total - leftSum - nums[i])
+            {
+                return i;
+            }
+
+            leftSum += nums[i];
+        }
+        return -1;
+    }
+}