Title Acceptance Level Subtract the Product and Sum of Digits of an Integer 85.2% Easy Find Numbers with Even Number of Digits 81.5% Easy Peak Index in a Mountain Array 71.6% Easy 1-bit and 2-bit Characters 48.8% Easy Two Sum 45.6% Easy House Robber 42.0% Easy Longest Common Prefix 35.4% Easy Sort the Matrix Diagonally 78.4% Medium Encode Number 66.1% Medium Rotate Image 56.7% Medium Combination Sum 56.1% Medium Longest Arithmetic Sequence 53.4% Medium Minimum Number of Arrows to Burst Balloons 49.6% Medium Previous Permutation With One Swap 48.5% Medium Diagonal Traverse 48.2% Medium Insert Delete GetRandom O(1) 47.5% Medium Path Sum III 47.2% Medium Path Sum II 46.7% Medium Meeting Rooms II 45.7% Medium Elimination Game 44.5% Medium Subarray Sum Equals K 43.9% Medium Find Peak Element 43.3% Medium Exam Room 43.1% Medium Contiguous Array 42.8% Medium 3Sum With Multiplicity 35.7% Medium Next Permutation 32.6% Medium 3Sum 26.8% Medium Serialize and Deserialize Binary Tree 47.5% Hard Construct Target Array With Multiple Sums 31.9% Hard Reaching Points 29.4% Hard