Added tasks 193, 194, 195, 196.

Author: ThanhNIT

README.md

@@ -628,6 +628,7 @@ implementation 'com.github.javadev:leetcode-in-kotlin:1.5'
 
 | <!-- --> | <!-- --> | <!-- --> | <!-- --> | <!-- --> | <!-- -->
 |-|-|-|-|-|-
+| 0196 |[Delete Duplicate Emails](src/main/kotlin/g0101_0200/s0196_delete_duplicate_emails/script.sql)| Easy | Database | 593 | 94.17
 
 #### Day 3 String Processing Functions
 
@@ -1571,6 +1572,10 @@ implementation 'com.github.javadev:leetcode-in-kotlin:1.5'
 | 0200 |[Number of Islands](src/main/kotlin/g0101_0200/s0200_number_of_islands/Solution.kt)| Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Algorithm_II_Day_6_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_1_Matrix_Related_Problems, Level_1_Day_9_Graph/BFS/DFS, Udemy_Graph | 252 | 95.41
 | 0199 |[Binary Tree Right Side View](src/main/kotlin/g0101_0200/s0199_binary_tree_right_side_view/Solution.kt)| Medium | Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_II_Day_16_Tree, Level_2_Day_15_Tree | 194 | 92.89
 | 0198 |[House Robber](src/main/kotlin/g0101_0200/s0198_house_robber/Solution.kt)| Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_3, Level_2_Day_12_Dynamic_Programming, Udemy_Dynamic_Programming | 156 | 92.24
+| 0196 |[Delete Duplicate Emails](src/main/kotlin/g0101_0200/s0196_delete_duplicate_emails/script.sql)| Easy | Database, SQL_I_Day_2_Select_and_Order | 593 | 94.17
+| 0195 |[Tenth Line](src/main/kotlin/g0101_0200/s0195_tenth_line/script.sh)| Easy | Shell | 36 | 87.50
+| 0194 |[Transpose File](src/main/kotlin/g0101_0200/s0194_transpose_file/script.sh)| Medium | Shell | 477 | 28.60
+| 0193 |[Valid Phone Numbers](src/main/kotlin/g0101_0200/s0193_valid_phone_numbers/script.sh)| Easy | Shell | 98 | 88.64
 | 0192 |[Word Frequency](src/main/kotlin/g0101_0200/s0192_word_frequency/script.sh)| Medium | Shell | 114 | 73.60
 | 0191 |[Number of 1 Bits](src/main/kotlin/g0101_0200/s0191_number_of_1_bits/Solution.kt)| Easy | Top_Interview_Questions, Bit_Manipulation, Algorithm_I_Day_13_Bit_Manipulation, Programming_Skills_I_Day_2_Operator, Udemy_Bit_Manipulation | 237 | 68.44
 | 0190 |[Reverse Bits](src/main/kotlin/g0101_0200/s0190_reverse_bits/Solution.kt)| Easy | Top_Interview_Questions, Bit_Manipulation, Divide_and_Conquer, Algorithm_I_Day_14_Bit_Manipulation, Udemy_Bit_Manipulation | 198 | 81.82

src/main/kotlin/g0101_0200/s0193_valid_phone_numbers/readme.md

@@ -0,0 +1,22 @@
+193\. Valid Phone Numbers
+
+Easy
+
+Given a text file `file.txt` that contains a list of phone numbers (one per line), write a one-liner bash script to print all valid phone numbers.
+
+You may assume that a valid phone number must appear in one of the following two formats: (xxx) xxx-xxxx or xxx-xxx-xxxx. (x means a digit)
+
+You may also assume each line in the text file must not contain leading or trailing white spaces.
+
+**Example:**
+
+Assume that `file.txt` has the following content:
+
+    987-123-4567
+    123 456 7890
+    (123) 456-7890 
+
+Your script should output the following valid phone numbers:
+
+    987-123-4567
+    (123) 456-7890 

src/main/kotlin/g0101_0200/s0193_valid_phone_numbers/script.sh

@@ -0,0 +1,3 @@
+# Read from the file file.txt and output all valid phone numbers to stdout.
+# #Easy #Shell #2022_10_18_Time_98_ms_(88.64%)_Space_3.1_MB_(55.55%)
+egrep '^[0-9]{3}-[0-9]{3}-[0-9]{4}$|^\([0-9]{3}\)\s[0-9]{3}-[0-9]{4}$' file.txt

src/main/kotlin/g0101_0200/s0194_transpose_file/readme.md

@@ -0,0 +1,20 @@
+194\. Transpose File
+
+Medium
+
+Given a text file `file.txt`, transpose its content.
+
+You may assume that each row has the same number of columns, and each field is separated by the `' '` character.
+
+**Example:**
+
+If `file.txt` has the following content:
+
+    name age
+    alice 21
+    ryan 30 
+
+Output the following:
+
+    name alice ryan
+    age 21 30

src/main/kotlin/g0101_0200/s0194_transpose_file/script.sh

@@ -0,0 +1,8 @@
+# Read from the file file.txt and print its transposed content to stdout.
+# #Medium #Shell #2022_10_18_Time_477_ms_(28.60%)_Space_3.9_MB_(33.97%)
+wordcount=$(head -1 file.txt | wc -w)
+col_n=1
+while [[ $col_n -le $wordcount ]]; do
+	awk "{ print \$$col_n }" file.txt | paste -sd " "
+	col_n=$((col_n + 1))
+done

src/main/kotlin/g0101_0200/s0195_tenth_line/readme.md

@@ -0,0 +1,19 @@
+195\. Tenth Line
+
+Easy
+
+Given a text file `file.txt`, print just the 10th line of the file.
+
+**Example:**
+
+Assume that `file.txt` has the following content:
+
+Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Line 9 Line 10
+
+Your script should output the tenth line, which is:
+
+Line 10
+
+**Note:**  
+1\. If the file contains less than 10 lines, what should you output?  
+2\. There's at least three different solutions. Try to explore all possibilities.

src/main/kotlin/g0101_0200/s0195_tenth_line/script.sh

@@ -0,0 +1,3 @@
+# Read from the file file.txt and output the tenth line to stdout.
+# #Easy #Shell #2022_10_18_Time_36_ms_(87.50%)_Space_3.6_MB_(81.52%)
+sed -n 10p file.txt

src/main/kotlin/g0101_0200/s0196_delete_duplicate_emails/readme.md

@@ -0,0 +1,46 @@
+196\. Delete Duplicate Emails
+
+Easy
+
+SQL Schema
+
+Table: `Person`
+
+    +-------------+---------+
+    | Column Name | Type    |
+    +-------------+---------+
+    | id          | int     |
+    | email       | varchar |
+    +-------------+---------+
+    id is the primary key column for this table.
+    Each row of this table contains an email. The emails will not contain uppercase letters. 
+
+Write an SQL query to **delete** all the duplicate emails, keeping only one unique email with the smallest `id`.
+
+Return the result table in **any order**.
+
+The query result format is in the following example.
+
+**Example 1:**
+
+**Input:**
+
+    Person table:
+    +----+------------------+
+    | id | email            |
+    +----+------------------+
+    | 1  | john@example.com |
+    | 2  | bob@example.com  |
+    | 3  | john@example.com |
+    +----+------------------+
+
+**Output:**
+
+    +----+------------------+
+    | id | email            |
+    +----+------------------+
+    | 1  | john@example.com |
+    | 2  | bob@example.com  |
+    +----+------------------+
+
+**Explanation:** john@example.com is repeated two times. We keep the row with the smallest Id = 1. 

src/main/kotlin/g0101_0200/s0196_delete_duplicate_emails/script.sql

@@ -0,0 +1,4 @@
+# Write your MySQL query statement below
+# #Easy #Database #SQL_I_Day_2_Select_and_Order #2022_10_18_Time_593_ms_(94.17%)_Space_0B_(100.00%)
+DELETE FROM Person
+WHERE Id NOT IN (SELECT id FROM (SELECT Email, MIN(Id) AS id FROM Person GROUP BY Email) t)

src/test/kotlin/g0101_0200/s0196_delete_duplicate_emails/MysqlTest.kt

@@ -0,0 +1,50 @@
+package g0101_0200.s0196_delete_duplicate_emails
+
+import org.hamcrest.CoreMatchers.equalTo
+import org.hamcrest.MatcherAssert.assertThat
+import org.junit.jupiter.api.Test
+import org.zapodot.junit.db.annotations.EmbeddedDatabase
+import org.zapodot.junit.db.annotations.EmbeddedDatabaseTest
+import org.zapodot.junit.db.common.CompatibilityMode
+import java.io.BufferedReader
+import java.io.FileNotFoundException
+import java.io.FileReader
+import java.sql.SQLException
+import java.util.stream.Collectors.joining
+import javax.sql.DataSource
+
+@EmbeddedDatabaseTest(
+    compatibilityMode = CompatibilityMode.MySQL,
+    initialSqls = [
+        "CREATE TABLE Person(id INTEGER PRIMARY KEY, email VARCHAR); " +
+            "INSERT INTO Person(id, email) VALUES (1, 'john@example.com'); " +
+            "INSERT INTO Person(id, email) VALUES (2, 'bob@example.com'); " +
+            "INSERT INTO Person(id, email) VALUES (3, 'john@example.com'); "
+    ]
+)
+internal class MysqlTest {
+    @Test
+    @Throws(SQLException::class, FileNotFoundException::class)
+    fun testScript(@EmbeddedDatabase dataSource: DataSource) {
+        dataSource.connection.use { connection ->
+            connection.createStatement().use { statement ->
+                statement.executeUpdate(
+                    BufferedReader(
+                        FileReader(
+                            "src/main/kotlin/g0101_0200/s0196_delete_duplicate_emails/script.sql"
+                        )
+                    )
+                        .lines()
+                        .collect(joining("\n"))
+                        .replace("#.*?\\r?\\n".toRegex(), "")
+                )
+                val resultSet = statement.executeQuery("select email from Person")
+                assertThat(resultSet.next(), equalTo(true))
+                assertThat(resultSet.getNString(1), equalTo("john@example.com"))
+                assertThat(resultSet.next(), equalTo(true))
+                assertThat(resultSet.getNString(1), equalTo("bob@example.com"))
+                assertThat(resultSet.next(), equalTo(false))
+            }
+        }
+    }
+}