20240912 finished.

README.md

@@ -1,5 +1,17 @@
 # LeetCode
 
-运行`cargo run`来初始化题目的模板文件。
+使用Rust完成LeetCode上的题目。
 
-运行`cargo test test_{id}`来运行指定题目的测试。
+## 使用方法
+
+```shell
+just pull <id>
+```
+
+获得指定`<id>`的题目。
+
+```shell
+just commit
+```
+
+提交目前完成的题目，提交信息的格式为`YYYYMMdd finished.`。

justfile

@@ -1,6 +1,9 @@
 #!/usr/bin/env just --justfile
 
-build:
+update:
+    git pull
+
+build: update
     cargo build --release
 
 test:

src/problem/mod.rs

@@ -233,3 +233,4 @@ mod p977_squares_of_a_sorted_array;
 mod p2181_merge_nodes_in_between_zeros;
 mod p2552_count_increasing_quadruplets;
 mod p2555_maximize_win_from_two_segments;
+mod p2576_find_the_maximum_number_of_marked_indices;

src/problem/p2576_find_the_maximum_number_of_marked_indices.rs

@@ -0,0 +1,53 @@
+/**
+ * [2576] Find the Maximum Number of Marked Indices
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+
+impl Solution {
+    pub fn max_num_of_marked_indices(nums: Vec<i32>) -> i32 {
+        let mut nums = nums;
+        nums.sort();
+        let n = nums.len();
+
+        let check = |k: usize| -> bool {
+            for i in 0..k {
+                if nums[i] * 2 > nums[n - k + i] {
+                    return false;
+                }
+            }
+
+            true
+        };
+
+        let (mut left, mut right) = (0, n / 2);
+
+        while left < right {
+            let middle = (left + right + 1) / 2;
+
+            if check(middle) {
+                left = middle;
+            } else {
+                right = middle - 1;
+            }
+        }
+
+        (left * 2) as i32
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2576() {
+        assert_eq!(2, Solution::max_num_of_marked_indices(vec![3, 5, 2, 4]));
+        assert_eq!(4, Solution::max_num_of_marked_indices(vec![9, 2, 5, 4]));
+        assert_eq!(0, Solution::max_num_of_marked_indices(vec![7, 6, 8]));
+    }
+}