diff --git a/src/main/kotlin/g0001_0100/s0006_zigzag_conversion/Solution.kt b/src/main/kotlin/g0001_0100/s0006_zigzag_conversion/Solution.kt
index 3e080d105..d60d68046 100644
--- a/src/main/kotlin/g0001_0100/s0006_zigzag_conversion/Solution.kt
+++ b/src/main/kotlin/g0001_0100/s0006_zigzag_conversion/Solution.kt
@@ -1,6 +1,6 @@
 package g0001_0100.s0006_zigzag_conversion
 
-// #Medium #String #Top_Interview_150_Array/String
+// #Medium #String #Top_Interview_150_Array/String #Big_O_Time_O(n)_Space_O(n)
 // #2023_07_03_Time_200_ms_(97.79%)_Space_37.3_MB_(91.71%)
 
 class Solution {
diff --git a/src/main/kotlin/g0001_0100/s0007_reverse_integer/Solution.kt b/src/main/kotlin/g0001_0100/s0007_reverse_integer/Solution.kt
index db2801859..a9e5a7da3 100644
--- a/src/main/kotlin/g0001_0100/s0007_reverse_integer/Solution.kt
+++ b/src/main/kotlin/g0001_0100/s0007_reverse_integer/Solution.kt
@@ -1,6 +1,6 @@
 package g0001_0100.s0007_reverse_integer
 
-// #Medium #Top_Interview_Questions #Math #Udemy_Integers
+// #Medium #Top_Interview_Questions #Math #Udemy_Integers #Big_O_Time_O(log10(x))_Space_O(1)
 // #2023_07_03_Time_149_ms_(77.89%)_Space_33.5_MB_(84.42%)
 
 class Solution {
diff --git a/src/main/kotlin/g0001_0100/s0008_string_to_integer_atoi/Solution.kt b/src/main/kotlin/g0001_0100/s0008_string_to_integer_atoi/Solution.kt
index 9cf2d12f0..0aa849bce 100644
--- a/src/main/kotlin/g0001_0100/s0008_string_to_integer_atoi/Solution.kt
+++ b/src/main/kotlin/g0001_0100/s0008_string_to_integer_atoi/Solution.kt
@@ -1,6 +1,7 @@
 package g0001_0100.s0008_string_to_integer_atoi
 
-// #Medium #Top_Interview_Questions #String #2023_07_03_Time_172_ms_(82.90%)_Space_34.9_MB_(88.08%)
+// #Medium #Top_Interview_Questions #String #Big_O_Time_O(n)_Space_O(n)
+// #2023_07_03_Time_172_ms_(82.90%)_Space_34.9_MB_(88.08%)
 
 class Solution {
     fun myAtoi(str: String): Int {
diff --git a/src/main/kotlin/g0001_0100/s0009_palindrome_number/Solution.kt b/src/main/kotlin/g0001_0100/s0009_palindrome_number/Solution.kt
index ed6f39feb..f77297ce6 100644
--- a/src/main/kotlin/g0001_0100/s0009_palindrome_number/Solution.kt
+++ b/src/main/kotlin/g0001_0100/s0009_palindrome_number/Solution.kt
@@ -1,6 +1,6 @@
 package g0001_0100.s0009_palindrome_number
 
-// #Easy #Math #Udemy_Integers #Top_Interview_150_Math
+// #Easy #Math #Udemy_Integers #Top_Interview_150_Math #Big_O_Time_O(log10(x))_Space_O(1)
 // #2023_07_03_Time_217_ms_(95.34%)_Space_36.1_MB_(98.21%)
 
 class Solution {
diff --git a/src/main/kotlin/g0001_0100/s0012_integer_to_roman/Solution.kt b/src/main/kotlin/g0001_0100/s0012_integer_to_roman/Solution.kt
index 3cc002a26..47fb006b0 100644
--- a/src/main/kotlin/g0001_0100/s0012_integer_to_roman/Solution.kt
+++ b/src/main/kotlin/g0001_0100/s0012_integer_to_roman/Solution.kt
@@ -1,6 +1,6 @@
 package g0001_0100.s0012_integer_to_roman
 
-// #Medium #String #Hash_Table #Math #Top_Interview_150_Array/String
+// #Medium #String #Hash_Table #Math #Top_Interview_150_Array/String #Big_O_Time_O(1)_Space_O(1)
 // #2023_07_03_Time_180_ms_(98.25%)_Space_37_MB_(82.89%)
 
 class Solution {
diff --git a/src/main/kotlin/g0001_0100/s0013_roman_to_integer/Solution.kt b/src/main/kotlin/g0001_0100/s0013_roman_to_integer/Solution.kt
index 6d7140be0..9f9a6a634 100644
--- a/src/main/kotlin/g0001_0100/s0013_roman_to_integer/Solution.kt
+++ b/src/main/kotlin/g0001_0100/s0013_roman_to_integer/Solution.kt
@@ -1,7 +1,7 @@
 package g0001_0100.s0013_roman_to_integer
 
 // #Easy #Top_Interview_Questions #String #Hash_Table #Math #Top_Interview_150_Array/String
-// #2023_07_03_Time_211_ms_(83.47%)_Space_36.9_MB_(91.66%)
+// #Big_O_Time_O(n)_Space_O(1) #2023_07_03_Time_211_ms_(83.47%)_Space_36.9_MB_(91.66%)
 
 class Solution {
     fun romanToInt(s: String): Int {
diff --git a/src/main/kotlin/g0001_0100/s0014_longest_common_prefix/Solution.kt b/src/main/kotlin/g0001_0100/s0014_longest_common_prefix/Solution.kt
index dfe18f4d2..3d20c338e 100644
--- a/src/main/kotlin/g0001_0100/s0014_longest_common_prefix/Solution.kt
+++ b/src/main/kotlin/g0001_0100/s0014_longest_common_prefix/Solution.kt
@@ -1,7 +1,8 @@
 package g0001_0100.s0014_longest_common_prefix
 
 // #Easy #Top_Interview_Questions #String #Level_2_Day_2_String #Udemy_Strings
-// #Top_Interview_150_Array/String #2023_07_03_Time_154_ms_(89.70%)_Space_34.6_MB_(95.06%)
+// #Top_Interview_150_Array/String #Big_O_Time_O(n*m)_Space_O(m)
+// #2023_07_03_Time_154_ms_(89.70%)_Space_34.6_MB_(95.06%)
 
 class Solution {
     fun longestCommonPrefix(strs: Array<String>): String {