✅ [724] too ez ...

Author: enkr1

724/my_solution.js

@@ -0,0 +1,27 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+var pivotIndex = function (nums) {
+  let sum = [], acc = 0
+
+  for (let i = 0; i < nums.length; i++) {
+    acc += nums[i]
+    sum[i] = acc;
+  }
+
+  for (let i = 0; i < nums.length; i++) {
+    console.log((sum[i - 1] ?? 0))
+    console.log(acc[sum.length - 1] - sum[i])
+    if ((sum[i - 1] ?? 0) === (sum[sum.length - 1] - sum[i])) return i;
+
+  }
+
+  return -1;
+};
+
+let x =
+  pivotIndex([1, 7, 3, 6, 5, 6])
+
+console.log("Res")
+console.log(x)

724/solution.js

@@ -0,0 +1,19 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+var pivotIndex = function (nums) {
+  let sum = [], acc = 0
+
+  for (let i = 0; i < nums.length; i++) {
+    acc += nums[i]
+    sum[i] = acc;
+  }
+
+  for (let i = 0; i < nums.length; i++) {
+    if ((sum[i - 1] ?? 0) === (sum[sum.length - 1] - sum[i])) return i;
+  }
+
+  return -1;
+};
+

README.md

@@ -91,6 +91,7 @@
 - [605. Can Place Flowers](./605/)
 - [643. Maximum Average Subarray I](./643/)
 - [647. Palindromic Substrings](./647/)
+- [724. Find Pivot Index](./724/)
 - [771. Jewels and Stones](./771/)
 - [714. Best Time to Buy and Sell Stock with Transaction Fee](./714/)
 - [832. Flipping an Image](./832/)
@@ -167,7 +168,7 @@ Batch create:
 NOTE: JS IS HERE
 -->
 ```ssh
-chapter=1732 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
+chapter=724 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
 ```
 > then you can use `x` for quick debug.