Update note generation script to auto-detect exercises and improve title formatting

create_missing_notes.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # LeetCode Notes Generator
-# This script creates missing note files for solved problems
+# This script automatically creates missing note files for solved problems
 
 NOTES_DIR="src/notes"
 EXERCISES_DIR="src/exercises"
@@ -9,7 +9,7 @@ EXERCISES_DIR="src/exercises"
 # Create notes directory if it doesn't exist
 mkdir -p "$NOTES_DIR"
 
-echo "🧠 Generating missing LeetCode problem notes..."
+echo "🧠 Scanning exercises directory and generating missing LeetCode problem notes..."
 
 # Function to convert problem number to 3-digit format
 format_problem_number() {
@@ -22,6 +22,41 @@ title_to_filename() {
     echo "$1" | tr ' ' '_' | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9_]//g'
 }
 
+# Function to extract problem number from filename
+extract_problem_number() {
+    local filename=$1
+    echo "$filename" | sed 's/^\([0-9]*\)\..*/\1/'
+}
+
+# Function to convert filename to problem title
+filename_to_title() {
+    local filename=$1
+    # Remove the .py extension and problem number
+    local title=$(echo "$filename" | sed 's/^[0-9]*\.//' | sed 's/\.py$//')
+    # Convert kebab-case to Title Case with proper handling
+    echo "$title" | sed 's/-/ /g' | sed 's/\b\w/\U&/g' | sed 's/\bii\b/II/g' | sed 's/\biii\b/III/g'
+}
+
+# Function to determine difficulty based on problem number ranges
+get_difficulty() {
+    local problem_num=$1
+    
+    # Hard problems (known)
+    case $problem_num in
+        4|10|42|135|149|248)
+            echo "Hard"
+            ;;
+        # Easy problems (known)
+        1|9|13|14|20|21|28|35|66|69|88|121|125|141|169|202|205|206|217|219|228|242|243|246|290|383|392|704|1200|2053|2441|3442|3445)
+            echo "Easy"
+            ;;
+        # Everything else is Medium
+        *)
+            echo "Medium"
+            ;;
+    esac
+}
+
 # Function to create note file
 create_note_file() {
     local problem_num=$1
@@ -54,101 +89,63 @@ create_note_file() {
         echo "*Note: This is a work in progress. I'll add more details as I reflect on this problem.*" >> "$filename"
         
         echo "✅ Created: $filename"
+        return 0
     else
         echo "⏭️  Skipped: $filename (already exists)"
+        return 1
     fi
 }
 
-# Define all solved problems with their details
+# Counter for statistics
-declare -A problems=(
+created_count=0
-    ["1"]="Two Sum:Easy"
+skipped_count=0
-    ["2"]="Add Two Numbers:Medium"
-    ["3"]="Longest Substring Without Repeating Characters:Medium"
-    ["4"]="Median of Two Sorted Arrays:Hard"
-    ["5"]="Longest Palindromic Substring:Medium"
-    ["6"]="Zigzag Conversion:Medium"
-    ["7"]="Reverse Integer:Medium"
-    ["9"]="Palindrome Number:Easy"
-    ["10"]="Regular Expression Matching:Hard"
-    ["11"]="Container With Most Water:Medium"
-    ["13"]="Roman to Integer:Easy"
-    ["14"]="Longest Common Prefix:Easy"
-    ["15"]="3Sum:Medium"
-    ["20"]="Valid Parentheses:Easy"
-    ["21"]="Merge Two Sorted Lists:Easy"
-    ["22"]="Generate Parentheses:Medium"
-    ["28"]="Find the Index of the First Occurrence in a String:Easy"
-    ["35"]="Search Insert Position:Easy"
-    ["36"]="Valid Sudoku:Medium"
-    ["42"]="Trapping Rain Water:Hard"
-    ["45"]="Jump Game II:Medium"
-    ["50"]="Pow(x, n):Medium"
-    ["55"]="Jump Game:Medium"
-    ["66"]="Plus One:Easy"
-    ["69"]="Sqrt(x):Easy"
-    ["74"]="Search a 2D Matrix:Medium"
-    ["80"]="Remove Duplicates from Sorted Array II:Medium"
-    ["88"]="Merge Sorted Array:Easy"
-    ["89"]="Gray Code:Medium"
-    ["90"]="Subsets II:Medium"
-    ["91"]="Decode Ways:Medium"
-    ["92"]="Reverse Linked List II:Medium"
-    ["121"]="Best Time to Buy and Sell Stock:Easy"
-    ["122"]="Best Time to Buy and Sell Stock II:Medium"
-    ["125"]="Valid Palindrome:Easy"
-    ["128"]="Longest Consecutive Sequence:Medium"
-    ["135"]="Candy:Hard"
-    ["141"]="Linked List Cycle:Easy"
-    ["149"]="Max Points on a Line:Hard"
-    ["150"]="Evaluate Reverse Polish Notation:Medium"
-    ["153"]="Find Minimum in Rotated Sorted Array:Medium"
-    ["155"]="Min Stack:Medium"
-    ["167"]="Two Sum II - Input Array Is Sorted:Medium"
-    ["169"]="Majority Element:Easy"
-    ["172"]="Factorial Trailing Zeroes:Medium"
-    ["189"]="Rotate Array:Medium"
-    ["202"]="Happy Number:Easy"
-    ["205"]="Isomorphic Strings:Easy"
-    ["206"]="Reverse Linked List:Easy"
-    ["217"]="Contains Duplicate:Easy"
-    ["219"]="Contains Duplicate II:Easy"
-    ["228"]="Summary Ranges:Easy"
-    ["238"]="Product of Array Except Self:Medium"
-    ["242"]="Valid Anagram:Easy"
-    ["243"]="Shortest Word Distance:Easy"
-    ["244"]="Shortest Word Distance II:Medium"
-    ["245"]="Shortest Word Distance III:Medium"
-    ["246"]="Strobogrammatic Number:Easy"
-    ["248"]="Strobogrammatic Number III:Hard"
-    ["290"]="Word Pattern:Easy"
-    ["383"]="Ransom Note:Easy"
-    ["392"]="Is Subsequence:Easy"
-    ["704"]="Binary Search:Easy"
-    ["875"]="Koko Eating Bananas:Medium"
-    ["990"]="Satisfiability of Equality Equations:Medium"
-    ["1200"]="Minimum Absolute Difference:Easy"
-    ["1298"]="Maximum Candies You Can Get from Boxes:Medium"
-    ["1820"]="Maximum Number of Accepted Invitations:Medium"
-    ["2040"]="Kth Smallest Product of Two Sorted Arrays:Medium"
-    ["2053"]="Kth Distinct String in an Array:Easy"
-    ["2116"]="Check if a Parentheses String Can Be Valid:Medium"
-    ["2294"]="Partition Array Such That Maximum Difference Is K:Medium"
-    ["2441"]="Largest Positive Integer That Exists With Its Negative:Easy"
-    ["2616"]="Minimize the Maximum Difference of Pairs:Medium"
-    ["2966"]="Divide Array Into Arrays With Max Difference:Medium"
-    ["3442"]="Maximum Difference Between Even and Odd Frequency I:Easy"
-    ["3445"]="Maximum Difference Between Even and Odd Frequency II:Easy"
-)
 
-# Create note files for all problems
+# Scan exercises directory for Python files
-for problem_num in "${!problems[@]}"; do
+if [ -d "$EXERCISES_DIR" ]; then
-    IFS=':' read -r title difficulty <<< "${problems[$problem_num]}"
+    for file in "$EXERCISES_DIR"/*.py; do
-    create_note_file "$problem_num" "$title" "$difficulty"
+        if [ -f "$file" ]; then
-done
+            # Extract filename without path
+            filename=$(basename "$file")
+            
+            # Skip empty files
+            if [ ! -s "$file" ]; then
+                echo "⚠️  Skipped empty file: $filename"
+                continue
+            fi
+            
+            # Extract problem number
+            problem_num=$(extract_problem_number "$filename")
+            
+            # Skip if no problem number found
+            if [ -z "$problem_num" ] || [ "$problem_num" = "$filename" ]; then
+                echo "⚠️  Skipped invalid filename: $filename"
+                continue
+            fi
+            
+            # Convert filename to title
+            title=$(filename_to_title "$filename")
+            
+            # Get difficulty
+            difficulty=$(get_difficulty "$problem_num")
+            
+            # Create note file
+            if create_note_file "$problem_num" "$title" "$difficulty"; then
+                ((created_count++))
+            else
+                ((skipped_count++))
+            fi
+        fi
+    done
+else
+    echo "❌ Error: Exercises directory '$EXERCISES_DIR' not found!"
+    exit 1
+fi
 
 echo ""
 echo "🎉 Note generation complete!"
-echo "📝 Total problems processed: ${#problems[@]}"
+echo "📝 Files processed: $((created_count + skipped_count))"
+echo "✅ New notes created: $created_count"
+echo "⏭️  Notes skipped (already exist): $skipped_count"
 echo "📁 Notes directory: $NOTES_DIR"
 echo ""
 echo "💡 Tip: Run this script whenever you solve new problems to automatically create note templates." 

src/notes/167_two_sum_ii_input_array_is_sorted.md

@@ -0,0 +1,22 @@
+# two sum ii input array is sorted
+
+**Problem Number:** 167
+**Difficulty:** Medium
+**Category:** 
+
+## Problem Description
+
+## My Approach
+
+## Solution
+
+## Time & Space Complexity
+
+## Key Insights
+
+## Mistakes Made
+
+## Related Problems
+
+---
+*Note: This is a work in progress. I'll add more details as I reflect on this problem.*