Total Problems
247
↑ 12% from last week
Completed
89
36% completion rate
Current Streak
7 days
Keep it up!
Rank
#1,247
↑ 234 positions
Weekly Progress
Difficulty Distribution
Recent Activity
Solved "Two Sum"
5 minutes ago
Solved "Binary Tree Level Order"
2 hours ago
Attempted "Regular Expression Matching"
1 day ago
Quick Actions
Achievements
Fast Solver
Solved 5 problems in 30 min
Consistency King
7 day streak achieved
Coding Categories
Explore our comprehensive problem categories
Arrays
Master array manipulation and common patterns
Strings
Explore string algorithms and text processing
Trees
Understand tree structures and traversal techniques
Dynamic Programming
Master DP patterns and optimization techniques
Graphs
Explore graph algorithms and network flows
Bookmarks
Your saved problems to revisit later
Two Sum
★Find two numbers that add up to target value
Longest Palindromic Substring
★Find the longest palindromic substring
Merge k Sorted Lists
★Merge k sorted linked lists into one sorted list
Valid Parentheses
★Check if parentheses are valid
Binary Tree Inorder Traversal
★Inorder traversal of binary tree
LRU Cache
★Design LRU cache with O(1) operations
You have 6 bookmarked problems
Alex Johnson
Senior Frontend Developer
Recent Activity
Solved "Two Sum - LeetCode"
2 hours ago
Bookmarked "Binary Tree Traversal"
5 hours ago