Add solution #1551

Author: JoshCrozier

README.md

@@ -179,6 +179,7 @@
 1502|[Can Make Arithmetic Progression From Sequence](./1502-can-make-arithmetic-progression-from-sequence.js)|Easy|
 1507|[Reformat Date](./1507-reformat-date.js)|Easy|
 1550|[Three Consecutive Odds](./1550-three-consecutive-odds.js)|Easy|
+1551|[Minimum Operations to Make Array Equal](./1551-minimum-operations-to-make-array-equal.js)|Medium|
 1598|[Crawler Log Folder](./1598-crawler-log-folder.js)|Easy|
 1780|[Check if Number is a Sum of Powers of Three](./1780-check-if-number-is-a-sum-of-powers-of-three.js)|Medium|
 1880|[Check if Word Equals Summation of Two Words](./1880-check-if-word-equals-summation-of-two-words.js)|Easy|

solutions/1551-minimum-operations-to-make-array-equal.js

@@ -0,0 +1,24 @@
+/**
+ * 1551. Minimum Operations to Make Array Equal
+ * https://leetcode.com/problems/minimum-operations-to-make-array-equal/
+ * Difficulty: Medium
+ *
+ * You have an array arr of length n where arr[i] = (2 * i) + 1 for all valid values
+ * of i (i.e., 0 <= i < n).
+ *
+ * In one operation, you can select two indices x and y where 0 <= x, y < n and subtract
+ * 1 from arr[x] and add 1 to arr[y] (i.e., perform arr[x] -=1 and arr[y] += 1). The goal
+ * is to make all the elements of the array equal. It is guaranteed that all the elements
+ * of the array can be made equal using some operations.
+ *
+ * Given an integer n, the length of the array, return the minimum number of operations
+ * needed to make all the elements of arr equal.
+ */
+
+/**
+ * @param {number} n
+ * @return {number}
+ */
+var minOperations = function(n) {
+  return n * n / 4;
+};