Practice Problems

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115 Problems
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Dynamic Programming String
Hard
60.0%
+50 coins
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Jump Game II
Array Dynamic Programming
Hard
77.8%
+50 coins
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Minimum Window Substring
Hash Table Sliding Window String
Hard
75.0%
+50 coins
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Merge K Sorted Lists
Divide and Conquer Heap (Priority Queue) Linked List Sorting
Hard
57.1%
+50 coins
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Trapping Rain Water
Array Dynamic Programming Stack Two Pointers
Hard
70.6%
+50 coins
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Letter Combinations of a Phone Number
Backtracking Hash Table String
Medium
45.3%
+25 coins
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Subsets
Array Backtracking Bit Manipulation
Medium
38.1%
+25 coins
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Permutations
Array Backtracking
Medium
50.7%
+25 coins
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Combination Sum
Array Backtracking
Medium
41.1%
+25 coins
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Word Break
Dynamic Programming Hash Table String
Medium
51.2%
+25 coins
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Maximum Product Subarray
Array Dynamic Programming
Medium
41.4%
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Longest Palindromic Substring
Dynamic Programming String Two Pointers
Medium
44.3%
+25 coins
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Decode Ways
Dynamic Programming String
Medium
43.6%
+25 coins
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House Robber II
Array Dynamic Programming
Medium
47.9%
+25 coins
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House Robber
Array Dynamic Programming
Medium
51.2%
+25 coins
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Length of Last Word
String
Easy
66.2%
+10 coins
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First Bad Version
Binary Search
Easy
69.2%
+10 coins
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Reverse Bits
Bit Manipulation Divide and Conquer
Easy
63.5%
+10 coins
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Number of 1 Bits
Bit Manipulation Divide and Conquer
Easy
68.1%
+10 coins
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Pascal's Triangle
Array Dynamic Programming
Easy
66.4%
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