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🔤 Strings — Practice Problems

🎯 All Problems Hub ← Back to Strings 📊 DSA Hub
25
Total
12
Solved
9
Easy
12
Medium
4
Hard

🟢 Easy

#125 Valid Palindrome ✓ Solved
Easy arrays two pointers strings
🔗 Problem No notes yet
#242 Valid Anagram ✓ Solved
Easy strings
🔗 Problem No notes yet
#412 Fizz Buzz ✓ Solved
Easy strings
🔗 Problem 💻 Solution
#14 Longest Common Prefix ✓ Solved
Easy strings
🔗 Problem 📋 Approach
#344 Reverse String ○ Todo
Easy recursion strings two pointers
🔗 Problem No notes yet
#383 Ransom Note ○ Todo
Easy hashing strings
🔗 Problem No notes yet
#771 Jewels and Stones ○ Todo
Easy hashing strings
🔗 Problem No notes yet
#1189 Maximum Number of Balloons ○ Todo
Easy hashing strings
🔗 Problem No notes yet
#1832 Check if the Sentence Is Pangram ○ Todo
Easy hashing strings
🔗 Problem No notes yet

🟡 Medium

#3 Longest Substring Without Repeating Characters ✓ Solved
Medium arrays sliding window strings
🔗 Problem 💻 Solution
#424 Longest Repeating Character Replacement ✓ Solved
Medium arrays sliding window strings
🔗 Problem No notes yet
#567 Permutation in String ✓ Solved
Medium arrays sliding window strings
🔗 Problem No notes yet
#49 Group Anagrams ✓ Solved
Medium strings hashing
🔗 Problem No notes yet
#271 Encode and Decode Strings ✓ Solved
Medium strings
🔗 Problem 📋 Approach
#5 Longest Palindromic Substring ✓ Solved
Medium strings two pointers
🔗 Problem No notes yet
#647 Palindromic Substrings ○ Todo
Medium strings two pointers
🔗 Problem No notes yet
#17 Letter Combinations of a Phone Number ○ Todo
Medium backtracking strings
🔗 Problem No notes yet
#22 Generate Parentheses ○ Todo
Medium backtracking strings
🔗 Problem No notes yet
#1143 Longest Common Subsequence ○ Todo
Medium dynamic programming strings
🔗 Problem No notes yet
#72 Edit Distance ○ Todo
Medium dynamic programming strings
🔗 Problem No notes yet
#139 Word Break ○ Todo
Medium dynamic programming strings
🔗 Problem No notes yet

🔴 Hard

#76 Minimum Window Substring ✓ Solved
Hard arrays sliding window strings
🔗 Problem No notes yet
#340 Longest Substring with At Most K Distinct Characters ○ Todo
Hard arrays sliding window strings
🔗 Problem No notes yet
#127 Word Ladder ○ Todo
Hard graphs strings
🔗 Problem No notes yet
#68 Text Justification ✓ Solved
Hard strings
🔗 Problem 📋 Approach
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