diff --git a/solution/3300-3399/3307.Find the K-th Character in String Game II/README.md b/solution/3300-3399/3307.Find the K-th Character in String Game II/README.md
index 5065706f87f45..b2a5316dfdbeb 100644
--- a/solution/3300-3399/3307.Find the K-th Character in String Game II/README.md
+++ b/solution/3300-3399/3307.Find the K-th Character in String Game II/README.md
@@ -251,6 +251,61 @@ impl Solution {
}
```
+#### C#
+
+```cs
+public class Solution {
+ public char KthCharacter(long k, int[] operations) {
+ long n = 1;
+ int i = 0;
+ while (n < k) {
+ n *= 2;
+ ++i;
+ }
+ int d = 0;
+ while (n > 1) {
+ if (k > n / 2) {
+ k -= n / 2;
+ d += operations[i - 1];
+ }
+ n /= 2;
+ --i;
+ }
+ return (char)('a' + (d % 26));
+ }
+}
+```
+
+#### PHP
+
+```php
+class Solution {
+ /**
+ * @param Integer $k
+ * @param Integer[] $operations
+ * @return String
+ */
+ function kthCharacter($k, $operations) {
+ $n = 1;
+ $i = 0;
+ while ($n < $k) {
+ $n *= 2;
+ ++$i;
+ }
+ $d = 0;
+ while ($n > 1) {
+ if ($k > $n / 2) {
+ $k -= $n / 2;
+ $d += $operations[$i - 1];
+ }
+ $n /= 2;
+ --$i;
+ }
+ return chr(ord('a') + ($d % 26));
+ }
+}
+```
+
diff --git a/solution/3300-3399/3307.Find the K-th Character in String Game II/README_EN.md b/solution/3300-3399/3307.Find the K-th Character in String Game II/README_EN.md
index 3ead9e974af75..f8ad4b7e28c7b 100644
--- a/solution/3300-3399/3307.Find the K-th Character in String Game II/README_EN.md
+++ b/solution/3300-3399/3307.Find the K-th Character in String Game II/README_EN.md
@@ -248,6 +248,61 @@ impl Solution {
}
```
+#### C#
+
+```cs
+public class Solution {
+ public char KthCharacter(long k, int[] operations) {
+ long n = 1;
+ int i = 0;
+ while (n < k) {
+ n *= 2;
+ ++i;
+ }
+ int d = 0;
+ while (n > 1) {
+ if (k > n / 2) {
+ k -= n / 2;
+ d += operations[i - 1];
+ }
+ n /= 2;
+ --i;
+ }
+ return (char)('a' + (d % 26));
+ }
+}
+```
+
+#### PHP
+
+```php
+class Solution {
+ /**
+ * @param Integer $k
+ * @param Integer[] $operations
+ * @return String
+ */
+ function kthCharacter($k, $operations) {
+ $n = 1;
+ $i = 0;
+ while ($n < $k) {
+ $n *= 2;
+ ++$i;
+ }
+ $d = 0;
+ while ($n > 1) {
+ if ($k > $n / 2) {
+ $k -= $n / 2;
+ $d += $operations[$i - 1];
+ }
+ $n /= 2;
+ --$i;
+ }
+ return chr(ord('a') + ($d % 26));
+ }
+}
+```
+
diff --git a/solution/3300-3399/3307.Find the K-th Character in String Game II/Solution.cs b/solution/3300-3399/3307.Find the K-th Character in String Game II/Solution.cs
new file mode 100644
index 0000000000000..e5b4528c3de93
--- /dev/null
+++ b/solution/3300-3399/3307.Find the K-th Character in String Game II/Solution.cs
@@ -0,0 +1,20 @@
+public class Solution {
+ public char KthCharacter(long k, int[] operations) {
+ long n = 1;
+ int i = 0;
+ while (n < k) {
+ n *= 2;
+ ++i;
+ }
+ int d = 0;
+ while (n > 1) {
+ if (k > n / 2) {
+ k -= n / 2;
+ d += operations[i - 1];
+ }
+ n /= 2;
+ --i;
+ }
+ return (char)('a' + (d % 26));
+ }
+}
diff --git a/solution/3300-3399/3307.Find the K-th Character in String Game II/Solution.php b/solution/3300-3399/3307.Find the K-th Character in String Game II/Solution.php
new file mode 100644
index 0000000000000..7c56a34a4d892
--- /dev/null
+++ b/solution/3300-3399/3307.Find the K-th Character in String Game II/Solution.php
@@ -0,0 +1,25 @@
+class Solution {
+ /**
+ * @param Integer $k
+ * @param Integer[] $operations
+ * @return String
+ */
+ function kthCharacter($k, $operations) {
+ $n = 1;
+ $i = 0;
+ while ($n < $k) {
+ $n *= 2;
+ ++$i;
+ }
+ $d = 0;
+ while ($n > 1) {
+ if ($k > $n / 2) {
+ $k -= $n / 2;
+ $d += $operations[$i - 1];
+ }
+ $n /= 2;
+ --$i;
+ }
+ return chr(ord('a') + ($d % 26));
+ }
+}
\ No newline at end of file
diff --git a/solution/3600-3699/3601.Find Drivers with Improved Fuel Efficiency/README.md b/solution/3600-3699/3601.Find Drivers with Improved Fuel Efficiency/README.md
index 77f86b85e4aa2..6ff91ebff701d 100644
--- a/solution/3600-3699/3601.Find Drivers with Improved Fuel Efficiency/README.md
+++ b/solution/3600-3699/3601.Find Drivers with Improved Fuel Efficiency/README.md
@@ -8,7 +8,7 @@ tags:
-# [3601. Find Drivers with Improved Fuel Efficiency](https://leetcode.cn/problems/find-drivers-with-improved-fuel-efficiency)
+# [3601. 寻找燃油效率提升的驾驶员](https://leetcode.cn/problems/find-drivers-with-improved-fuel-efficiency)
[English Version](/solution/3600-3699/3601.Find%20Drivers%20with%20Improved%20Fuel%20Efficiency/README_EN.md)
@@ -16,7 +16,7 @@ tags:
-Table: drivers
+表：drivers
+-------------+---------+
@@ -25,11 +25,11 @@ tags:
| driver_id | int |
| driver_name | varchar |
+-------------+---------+
-driver_id is the unique identifier for this table.
-Each row contains information about a driver.
+driver_id 是这张表的唯一主键。
+每一行都包含一个司机的信息。
-Table: trips
+表：trips
+---------------+---------+
@@ -41,31 +41,32 @@ Each row contains information about a driver.
| distance_km | decimal |
| fuel_consumed | decimal |
+---------------+---------+
-trip_id is the unique identifier for this table.
-Each row represents a trip made by a driver, including the distance traveled and fuel consumed for that trip.
+trip_id 是这张表的唯一主键。
+每一行表示一名司机完成的一次行程，包括该次行程行驶的距离和消耗的燃油量。
-Write a solution to find drivers whose fuel efficiency has improved by comparing their average fuel efficiency in the first half of the year with the second half of the year.
+编写一个解决方案，通过 比较 司机在 上半年 和 下半年 的 平均燃油效率 来找出 燃油效率有所提高 的司机。
- - Calculate fuel efficiency as
distance_km / fuel_consumed for each trip
- - First half: January to June, Second half: July to December
- - Only include drivers who have trips in both halves of the year
- - Calculate the efficiency improvement as (
second_half_avg - first_half_avg)
- - Round all results to
2 decimal places
+ - 通过
distance_km / fuel_consumed 计算 每次 行程的 燃油效率。
+ - 上半年：一月到六月，下半年：七月到十二月
+ - 只包含在上半年和下半年都有行程的司机
+ - 通过（
second_half_avg - first_half_avg）计算 提升效率。
+ - 将所有结果 四舍五入 到小数点后
2 位
-Return the result table ordered by efficiency improvement in descending order, then by driver name in ascending order.
+返回结果表按提升效率 降序 排列，然后按司机姓名 升序 排列。
-The result format is in the following example.
+结果格式如下所示。
-Example:
+
+示例：
-
Input:
+
输入：
-
drivers table:
+
drivers 表：
+-----------+---------------+
@@ -79,7 +80,7 @@ Each row represents a trip made by a driver, including the distance traveled and
+-----------+---------------+
-
trips table:
+
trips 表：
+---------+-----------+------------+-------------+---------------+
@@ -100,7 +101,7 @@ Each row represents a trip made by a driver, including the distance traveled and
+---------+-----------+------------+-------------+---------------+
-
Output:
+
输出：
+-----------+---------------+------------------+-------------------+------------------------+
@@ -111,39 +112,39 @@ Each row represents a trip made by a driver, including the distance traveled and
+-----------+---------------+------------------+-------------------+------------------------+
-
Explanation:
+
解释：
- Alice Johnson (driver_id = 1):
- - First half trips (Jan-Jun): Feb 15 (120.5/10.2 = 11.81), Mar 20 (200.0/16.5 = 12.12)
- - First half average efficiency: (11.81 + 12.12) / 2 = 11.97
- - Second half trips (Jul-Dec): Aug 10 (150.0/11.0 = 13.64), Sep 25 (180.0/12.5 = 14.40)
- - Second half average efficiency: (13.64 + 14.40) / 2 = 14.02
- - Efficiency improvement: 14.02 - 11.97 = 2.05
+ - 上半年行程（一月到六月）：Feb 15 (120.5/10.2 = 11.81), Mar 20 (200.0/16.5 = 12.12)
+ - 上半年平均效率：(11.81 + 12.12) / 2 = 11.97
+ - 下半年行程（七月到十二月）：Aug 10 (150.0/11.0 = 13.64), Sep 25 (180.0/12.5 = 14.40)
+ - 下半年平均效率：(13.64 + 14.40) / 2 = 14.02
+ - 效率提升：14.02 - 11.97 = 2.05
- Bob Smith (driver_id = 2):
- - First half trips: Jan 10 (100.0/9.0 = 11.11), Apr 15 (250.0/22.0 = 11.36)
- - First half average efficiency: (11.11 + 11.36) / 2 = 11.24
- - Second half trips: Oct 5 (200.0/15.0 = 13.33)
- - Second half average efficiency: 13.33
- - Efficiency improvement: 13.33 - 11.24 = 2.09
+ - 上半年行程：Jan 10 (100.0/9.0 = 11.11), Apr 15 (250.0/22.0 = 11.36)
+ - 上半年平均效率：(11.11 + 11.36) / 2 = 11.24
+ - 下半年行程：Oct 5 (200.0/15.0 = 13.33)
+ - 下半年平均效率：13.33
+ - 效率提升：13.33 - 11.24 = 2.09
- - Drivers not included:
+
- 未包含的司机：
- - Carol Davis (driver_id = 3): Only has trips in first half (Mar, May)
- - David Wilson (driver_id = 4): Only has trips in second half (Jul, Nov)
- - Emma Brown (driver_id = 5): Only has trips in first half (Feb)
+ - Carol Davis (driver_id = 3)：只有上半年的行程（三月，五月）
+ - David Wilson (driver_id = 4)：只有下半年的行程（七月，十一月）
+ - Emma Brown (driver_id = 5)：只有上半年的行程（二月）
-
The output table is ordered by efficiency improvement in descending order then by name in ascending order.
+
输出表按提升效率降序排列，然后按司机名字升序排列。