update leetcode

leetcode_rs/problems/p136/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "p136"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

leetcode_rs/problems/p136/src/main.rs

@@ -0,0 +1,11 @@
+fn single_number(nums: Vec<i32>) -> i32 {
+    let mut buffer = 0;
+    for num in nums {
+        buffer ^= num;
+    }
+    buffer
+}
+
+fn main() {
+    dbg!(single_number([2, 2, 1].to_vec()));
+}