leetcode: Add remove-element

leetcode/0027.remove-element/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "lc-0027-remove-element"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]

leetcode/0027.remove-element/src/main.rs

@@ -0,0 +1,29 @@
+// Copyright (c) 2023 Xu Shaohua <[email protected]>. All rights reserved.
+// Use of this source is governed by General Public License that can be
+// found in the LICENSE file.
+
+pub fn remove_element(nums: &mut Vec<i32>, val: i32) -> i32 {
+    let mut i = 0;
+    while i < nums.len() {
+        if nums[i] == val {
+            nums.swap_remove(i);
+        } else {
+            i += 1;
+        }
+    }
+    nums.len() as i32
+}
+
+fn main() {
+    let mut nums = vec![3, 2, 2, 3];
+    let val = 3;
+    let len = remove_element(&mut nums, val);
+    assert_eq!(len, 2);
+    assert_eq!(nums, vec![2, 2]);
+
+    let mut nums = vec![0, 1, 2, 2, 3, 0, 4, 2];
+    let val = 2;
+    let len = remove_element(&mut nums, val);
+    assert_eq!(len, 5);
+    assert_eq!(nums, vec![0, 1, 4, 0, 3]);
+}