feat: add solutions to lc problems: No.0586,0806,1741,1890

- No.0586.Customer Placing the Largest Number of Orders
- No.0806.Number of Lines To Write String
- No.1741.Find Total Time Spent by Each Employee
- No.1890.The Latest Login in 2020

Author: YangFong

solution/0500-0599/0586.Customer Placing the Largest Number of Orders/README.md

@@ -75,4 +75,15 @@ ORDER BY COUNT(customer_number) DESC
 LIMIT 1;
 ```
 
+SQL Server
+
+```sql
+SELECT TOP 1
+    customer_number
+FROM
+    orders
+GROUP BY customer_number
+ORDER BY COUNT(customer_number) DESC;
+```
+
 <!-- tabs:end -->

solution/0500-0599/0586.Customer Placing the Largest Number of Orders/README_EN.md

@@ -69,4 +69,15 @@ ORDER BY COUNT(customer_number) DESC
 LIMIT 1;
 ```
 
+SQL Server
+
+```sql
+SELECT TOP 1
+    customer_number
+FROM
+    orders
+GROUP BY customer_number
+ORDER BY COUNT(customer_number) DESC;
+```
+
 <!-- tabs:end -->

solution/0800-0899/0806.Number of Lines To Write String/README.md

@@ -136,6 +136,26 @@ func numberOfLines(widths []int, s string) []int {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn number_of_lines(widths: Vec<i32>, s: String) -> Vec<i32> {
+        let mut count = 1;
+        let mut sum = 0;
+        for c in s.as_bytes() {
+            let width = widths[(c - b'a') as usize];
+            if sum + width > 100 {
+                sum = 0;
+                count += 1;
+            }
+            sum += width;
+        }
+        vec![count, sum]
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0800-0899/0806.Number of Lines To Write String/README_EN.md

@@ -131,6 +131,26 @@ func numberOfLines(widths []int, s string) []int {
 }
 ```
 
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn number_of_lines(widths: Vec<i32>, s: String) -> Vec<i32> {
+        let mut count = 1;
+        let mut sum = 0;
+        for c in s.as_bytes() {
+            let width = widths[(c - b'a') as usize];
+            if sum + width > 100 {
+                sum = 0;
+                count += 1;
+            }
+            sum += width;
+        }
+        vec![count, sum]
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0800-0899/0806.Number of Lines To Write String/Solution.rs

@@ -0,0 +1,15 @@
+impl Solution {
+    pub fn number_of_lines(widths: Vec<i32>, s: String) -> Vec<i32> {
+        let mut count = 1;
+        let mut sum = 0;
+        for c in s.as_bytes() {
+            let width = widths[(c - b'a') as usize];
+            if sum + width > 100 {
+                sum = 0;
+                count += 1;
+            }
+            sum += width;
+        }
+        vec![count, sum]
+    }
+}

solution/1700-1799/1741.Find Total Time Spent by Each Employee/README.md

@@ -62,7 +62,6 @@ Result table:
 ### **SQL**
 
 ```sql
-# Write your MySQL query statement below
 SELECT
     event_day AS day,
     emp_id,

solution/1700-1799/1741.Find Total Time Spent by Each Employee/README_EN.md

@@ -66,7 +66,6 @@ Employee 2 has two events: one on day 2020-11-28 with a total of (33 - 3) = 30,
 ### **SQL**
 
 ```sql
-# Write your MySQL query statement below
 SELECT
     event_day AS day,
     emp_id,

solution/1700-1799/1741.Find Total Time Spent by Each Employee/Solution.sql

@@ -1,4 +1,3 @@
-# Write your MySQL query statement below
 SELECT
     event_day AS day,
     emp_id,

solution/1800-1899/1890.The Latest Login in 2020/README.md

@@ -64,10 +64,9 @@ Result 表:
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```sql
-# Write your MySQL query statement below
 SELECT
     user_id,
-    max(time_stamp) AS last_stamp
+    MAX(time_stamp) AS last_stamp
 FROM
     Logins
 WHERE YEAR(time_stamp) = 2020

solution/1800-1899/1890.The Latest Login in 2020/README_EN.md

@@ -66,10 +66,9 @@ User 14 did not login in 2020, so we do not include them in the result table.
 ### **SQL**
 
 ```sql
-# Write your MySQL query statement below
 SELECT
     user_id,
-    max(time_stamp) AS last_stamp
+    MAX(time_stamp) AS last_stamp
 FROM
     Logins
 WHERE YEAR(time_stamp) = 2020