solve product of array except self

Author: delight010

product-of-array-except-self/delight010.swift

@@ -0,0 +1,17 @@
+class Solution {
+    func productExceptSelf(_ nums: [Int]) -> [Int] {
+        var answer: [Int] = Array(repeating: 1, count: nums.endIndex)
+        for i in 1..<nums.endIndex {
+            answer[i] = answer[i - 1] * nums[i - 1]
+        }
+        
+        var suffix = 1
+        for i in (0..<nums.endIndex).reversed() {
+            answer[i] *= suffix
+            suffix *= nums[i]
+        }
+        
+        return answer
+    }
+}
+