feat: product of array except self

Author: std-freejia

product-of-array-except-self/std-freejia.java

@@ -0,0 +1,23 @@
+class Solution {
+    public int[] productExceptSelf(int[] nums) {
+    int len = nums.length;
+    int[] res = new int[len];
+    int num = 1;
+
+    for (int i = 0; i < len; i++) {
+        res[i] = num;
+        num *= nums[i];
+    }
+    num = 1;
+    for (int i = len -1; i>=0; i--) {
+        res[i] *= num;
+        num *= nums[i];
+    }
+
+    for (int i = 0; i < len; i++) {
+        System.out.print( res[i] + " ");
+    }
+
+    return res;
+}
+}