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DifficultyTopic63 of 63
No.ProblemDifficultyFrequency
68Text JustificationHard
100.0%
2043Simple Bank SystemMedium
100.0%
723Candy CrushMedium
87.5%
3161Block Placement QueriesHard
87.5%
54Spiral Matrix
Array
Medium
87.5%
3071Minimum Operations to Write the Letter Y on a GridMedium
87.5%
48Rotate ImageMedium
75.0%
71Simplify PathMedium
75.0%
3043Find the Length of the Longest Common Prefix
DP
Medium
75.0%
2768Number of Black Blocks
Math
Medium
75.0%
2672Number of Adjacent Elements With the Same Color
Math
Medium
75.0%
1743Restore the Array From Adjacent Pairs
Array
Medium
75.0%
1390Four DivisorsMedium
62.5%
3101Count Alternating Subarrays
Array
Medium
62.5%
1438Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
Array
Medium
62.5%
257Binary Tree Paths
Tree
Easy
62.5%
84Largest Rectangle in HistogramHard
62.5%
200Number of Islands
GraphMath
Medium
62.5%
2169Count Operations to Obtain ZeroEasy
62.5%
1861Rotating the BoxMedium
62.5%
3045Count Prefix and Suffix Pairs IIHard
62.5%
2502Design Memory AllocatorMedium
62.5%
2Add Two Numbers
Math
Medium
50.0%
121Best Time to Buy and Sell StockEasy
50.0%
1166Design File SystemMedium
50.0%
9Palindrome Number
StringMath
Easy
50.0%
415Add Strings
String
Easy
50.0%
3034Number of Subarrays That Match a Pattern I
ArrayMath
Medium
50.0%
56Merge IntervalsMedium
50.0%
2817Minimum Absolute Difference Between Elements With ConstraintMedium
50.0%
539Minimum Time DifferenceMedium
50.0%
11Container With Most WaterMedium
50.0%
2021Brightest Position on Street
Tree
Medium
50.0%
896Monotonic Array
ArrayStack/Queue
Easy
50.0%
546Remove BoxesHard
37.5%
2251Number of Flowers in Full Bloom
Math
Hard
37.5%
435Non-overlapping IntervalsMedium
37.5%
253Meeting Rooms IIMedium
37.5%
3042Count Prefix and Suffix Pairs IEasy
37.5%
20Valid Parentheses
Stack/Queue
Easy
37.5%
146LRU CacheMedium
37.5%
992Subarrays with K Different Integers
ArrayMath
Hard
37.5%
3Longest Substring Without Repeating Characters
StringTree
Medium
37.5%
733Flood Fill
Graph
Easy
37.5%
1052Grumpy Bookstore OwnerMedium
37.5%
2544Alternating Digit Sum
Math
Easy
37.5%
1814Count Nice Pairs in an Array
Array
Medium
37.5%
332Reconstruct ItineraryHard
37.5%
127Word LadderHard
37.5%
3019Number of Changing Keys
Math
Easy
37.5%
560Subarray Sum Equals K
Array
Medium
37.5%
17Letter Combinations of a Phone Number
Math
Medium
37.5%
2141Maximum Running Time of N ComputersHard
37.5%
647Palindromic Substrings
StringTree
Medium
37.5%
2023Number of Pairs of Strings With Concatenation Equal to Target
StringMath
Medium
37.5%
3072Distribute Elements Into Two Arrays II
Array
Hard
37.5%
1Two Sum
Sliding Window
Easy
37.5%
128Longest Consecutive SequenceMedium
37.5%
412Fizz BuzzEasy
37.5%
75Sort ColorsMedium
37.5%
1865Finding Pairs With a Certain SumMedium
37.5%
5Longest Palindromic Substring
StringTree
Medium
37.5%
2232Minimize Result by Adding Parentheses to ExpressionMedium
37.5%