product of array Except self solved

Author: sora0319

product-of-array-except-self/sora0319.java

@@ -0,0 +1,21 @@
+class Solution {
+    public int[] productExceptSelf(int[] nums) {
+        int[] answer = new int[nums.length];
+        int multi = nums[0];
+        answer[0] = 1;
+
+        for(int i = 1; i < nums.length; i++){
+            answer[i] = multi;
+            multi *= nums[i];
+        }
+
+        multi = nums[nums.length-1];
+        for(int i = nums.length-2; i >= 0; i--){
+            answer[i] *= multi;
+            multi *= nums[i];
+        }
+
+        return answer;
+    }
+}
+