product of array except self solution

Author: robinyoon-dev

product-of-array-except-self/robinyoon-dev.js

@@ -4,6 +4,38 @@
  */
 var productExceptSelf = function (nums) {
 
+    const prefixProductArray = new Array(nums.length);
+    const suffixProductArray = new Array(nums.length);
+    const totalProductArray = new Array(nums.length);
+
+    //prefixProductArray의 기본값 설정
+    prefixProductArray[0] = 1;
+    prefixProductArray[1] = nums[0];
+
+    //suffixProductArray의 기본값 설정
+    suffixProductArray[nums.length - 1] = 1;
+    suffixProductArray[nums.length - 2] = nums[nums.length - 1];
+
+    for (let i = 2; i < nums.length; i++) {
+        prefixProductArray[i] = nums[i - 1] * prefixProductArray[i - 1];
+    }
+
+    for (let i = nums.length - 3; i >= 0; i--) {
+        suffixProductArray[i] = nums[i + 1] * suffixProductArray[i + 1];
+    }
+
+    for (let i = 0; i < nums.length; i++) {
+        totalProductArray[i] = prefixProductArray[i] * suffixProductArray[i];
+    }
+
+    return totalProductArray;
+
+};
+
+//-------------1회차 풀이(6기)-------------
+/*
+var productExceptSelf = function (nums) {
+
     const NUMS_LENGTH = nums.length;
     const isZeroArray = []; //boolean
     let zeroCount = 0;
@@ -40,4 +72,7 @@ var productExceptSelf = function (nums) {
 
     return tempArray;
 };
+ */
+
+