diff --git a/README.md b/README.md
index 1d738ce..ee4678e 100644
--- a/README.md
+++ b/README.md
@@ -48,18 +48,18 @@ cargo test
 #### Bit Manipulation
 |  #  | Title           |  Solution       |  Time           | Space           | Difficulty    | Tag          | Note| 
 |-----|---------------- | --------------- | --------------- | --------------- | ------------- |--------------|-----|
-0136 | [Single Number](https://leetcode.com/problems/single-number/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number.cpp), [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number.py) <br> [Rust](./kamyu104/src/single_number.rs) | _O(n)_       | _O(1)_          | Easy         |||
-0137 | [Single Number II](https://leetcode.com/problems/single-number-ii/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number-ii.cpp), [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number-ii.py) <br> [Rust](./kamyu104/src/single_number_ii.rs) | _O(n)_ | _O(1)_          | Medium         |||
-0190 | [Reverse Bits](https://leetcode.com/problems/reverse-bits/)  | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/reverse-bits.cpp), [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/reverse-bits.py) <br> [Rust](./kamyu104/src/reverse_bits.rs) | _O(1)_        | _O(1)_          | Easy           |||
-0191  |[Number of 1 Bits](https://leetcode.com/problems/number-of-1-bits/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/number-of-1-bits.cpp), [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/number-of-1-bits.py) <br> [Rust](./kamyu104/src/number_of_1_bits.rs) | _O(1)_ | _O(1)_          | Easy           |||
-0201 | [Bitwise AND of Numbers Range](https://leetcode.com/problems/bitwise-and-of-numbers-range/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/bitwise-and-of-numbers-range.cpp), [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/bitwise-and-of-numbers-range.py) <br> [Rust](./kamyu104/src/bitwise_and_of_numbers_range.rs) | _O(1)_ | _O(1)_ | Medium ||
-0231 | [Power of Two](https://leetcode.com/problems/power-of-two/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/power-of-two.cpp), [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/power-of-two.py) <br> [Rust](./kamyu104/src/power_of_two.rs) | _O(1)_ | _O(1)_ | Easy | LintCode |
-0260 | [Single Number III](https://leetcode.com/problems/single-number-iii/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number-iii.cpp), [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number-iii.py) <br> [Rust](./kamyu104/src/single_number_iii.rs) | _O(n)_ | _O(1)_          | Medium         ||
-0268| [Missing Number](https://leetcode.com/problems/missing-number/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/missing-number.cpp), [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/missing-number.py) <br> [Rust](./kamyu104/src/missing_number.rs) | _O(n)_ |  _O(1)_ | Medium         | LintCode ||
+0136 | [Single Number](https://leetcode.com/problems/single-number/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number.py) <br>------</br> [Rust](./kamyu104/src/single_number.rs) | _O(n)_       | _O(1)_          | Easy         |||
+0137 | [Single Number II](https://leetcode.com/problems/single-number-ii/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number-ii.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number-ii.py) <br>------</br> [Rust](./kamyu104/src/single_number_ii.rs) | _O(n)_ | _O(1)_          | Medium         |||
+0190 | [Reverse Bits](https://leetcode.com/problems/reverse-bits/)  | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/reverse-bits.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/reverse-bits.py) <br>------</br> [Rust](./kamyu104/src/reverse_bits.rs) | _O(1)_        | _O(1)_          | Easy           |||
+0191  |[Number of 1 Bits](https://leetcode.com/problems/number-of-1-bits/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/number-of-1-bits.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/number-of-1-bits.py) <br>------</br> [Rust](./kamyu104/src/number_of_1_bits.rs) | _O(1)_ | _O(1)_          | Easy           |||
+0201 | [Bitwise AND of Numbers Range](https://leetcode.com/problems/bitwise-and-of-numbers-range/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/bitwise-and-of-numbers-range.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/bitwise-and-of-numbers-range.py) <br>------</br> [Rust](./kamyu104/src/bitwise_and_of_numbers_range.rs) | _O(1)_ | _O(1)_ | Medium ||
+0231 | [Power of Two](https://leetcode.com/problems/power-of-two/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/power-of-two.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/power-of-two.py) <br>------</br> [Rust](./kamyu104/src/power_of_two.rs) | _O(1)_ | _O(1)_ | Easy | LintCode |
+0260 | [Single Number III](https://leetcode.com/problems/single-number-iii/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number-iii.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number-iii.py) <br>------</br> [Rust](./kamyu104/src/single_number_iii.rs) | _O(n)_ | _O(1)_          | Medium         ||
+0268| [Missing Number](https://leetcode.com/problems/missing-number/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/missing-number.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/missing-number.py) <br>------</br> [Rust](./kamyu104/src/missing_number.rs) | _O(n)_ |  _O(1)_ | Medium         | LintCode ||
+0318| [Maximum Product of Word Lengths](https://leetcode.com/problems/maximum-product-of-word-lengths/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/maximum-product-of-word-lengths.cpp) [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/maximum-product-of-word-lengths.py) <br>------</br> [Rust](./kamyu104/src/maximum_product_of_word_lengths.rs) | _O(n)_ ~ _O(n^2)_ |  _O(n)_ | Medium         || Bit Manipulation, Counting Sort, Pruning|
 
 <!-- 
 
-0318| [Maximum Product of Word Lengths](https://leetcode.com/problems/maximum-product-of-word-lengths/) | [C++](./C++/maximum-product-of-word-lengths.cpp) [Python](./Python/maximum-product-of-word-lengths.py)  | _O(n)_ ~ _O(n^2)_ |  _O(n)_ | Medium         || Bit Manipulation, Counting Sort, Pruning|
 0342 | [Power of Four](https://leetcode.com/problems/power-of-four/) | [C++](./C++/power-of-four.cpp) [Python](./Python/power-of-four.py) | _O(1)_ | _O(1)_ | Easy | |
 0371 | [Sum of Two Integers](https://leetcode.com/problems/sum-of-two-integers/) | [C++](./C++/sum-of-two-integers.cpp) [Python](./Python/sum-of-two-integers.py) | _O(1)_ | _O(1)_ | Easy | LintCode |
 0389 | [Find the Difference](https://leetcode.com/problems/find-the-difference/) | [C++](./C++/find-the-difference.cpp) [Python](./Python/find-the-difference.py) | _O(n)_ | _O(1)_ | Easy | |
diff --git a/kamyu104/src/main.rs b/kamyu104/src/main.rs
index 855a106..5c1a2ae 100644
--- a/kamyu104/src/main.rs
+++ b/kamyu104/src/main.rs
@@ -1,4 +1,5 @@
 mod bitwise_and_of_numbers_range;
+mod maximum_product_of_word_lengths;
 mod missing_number;
 mod number_of_1_bits;
 mod power_of_two;
diff --git a/kamyu104/src/maximum_product_of_word_lengths.rs b/kamyu104/src/maximum_product_of_word_lengths.rs
new file mode 100644
index 0000000..e4890b0
--- /dev/null
+++ b/kamyu104/src/maximum_product_of_word_lengths.rs
@@ -0,0 +1,18 @@
+pub struct Solution {}
+impl Solution {
+    pub fn max_product(words: Vec<String>) -> i32 {
+        0
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_max_product() {
+        // assert_max_product!(Solution::max_product(vec!["abcw","baz","foo","bar","xtfn","abcdef"]), 16);
+        // assert_max_product!(Solution::max_product(vec!["a","ab","abc","d","cd","bcd","abcd"]), 4);
+        // assert_max_product!(Solution::max_product(vec!["a","aa","aaa","aaaa"]), 0);
+    }
+}