Mar-17
- 1152.Analyze User Website Visit Pattern - Hinted
- I did in wrong way, don’t know the solution
Mar-17
- 0143.Reorder List - Reviewed solved
- 0048.Rotate Image - Reviewed solved
- 1249.Minimum Remove to Make Valid Parentheses
Mar-16
- 0206.Reverse Linked List - Solved
- 0143.Reorder List - Peeked
Mar-15
- 1590.Make Sum Divisible by P
- Peeked, confused to find use
remainder, p,prefix[i]to findprefix[j]
- Peeked, confused to find use
Mar-14
- 0155.Min Stack - Peeked
Mar-09
- 0567.Permutation in String - Solved
Mar-08
- 0042.Trapping Rain Water - Solved
- 0380.Insert Delete GetRandom O(1) - Peeked
Mar-07
- 2672.Number of Adjacent Elements With the Same Color - Hinted
- 2791.Count Paths That Can Form a Palindrome in a Tree - Peeked
Mar-06
- 0121.Best Time to Buy and Sell Stock - Solved
- 0207.Course Schedule - Solved BFS, add DFS
- 1944.Number of Visible People in a Queue
- Peeked, don’t understand stack
- 0215.Kth Largest Element in an Array - Solved
- 0875.Koko Eating Bananas - Peekd
- eat to fast need slow,
right = spd - 1
- eat to fast need slow,
- 0840.Magic Squares In Grid - Peeked
- Got stuck on how to iterate through each candidate
3 x 3square
- Got stuck on how to iterate through each candidate
Mar-05
- 0200.Number of Islands - Solved
- Use
deque([(r, c)])notdeque((r, c))
- Use
- 0994.Rotting Oranges - Solved
- 0022.Generate Parentheses - Hinted
- typo
pop()
- typo
Mar-04
- 0146.LRU Cache - Solved w bug
- Fixed:
del dictionary[key] - typo
self.node
- Fixed:
- 0056.Merge Intervals - Solved
- 0198.House Robber - Hinted, missed index
- 0057.Insert Interval - Peeked,
- Key fix: keep updating
newIntervalwhile it overlaps with current intervals
- Key fix: keep updating
Mar-03
- 0048.Rotate Image - Peeked, forget transpose + reverse
- 0424.Longest Repeating Character Replacement - Hinted, need redo
Mar-02
- 0167.Two Sum II - Solved
- 0128.Longest Consecutive Sequence - Peeked
- 0036.Valid Sudoku - Solved
- index calculated,
index // 3
- index calculated,
- 0015.3Sum - Peeked, return val not index
- 0011.Container w Most Water - Solved
- 0003.Longest Substring wo Repeating Characters - Solved
Mar-01
- 0271.Encode and Decode Strings - Solved, index confused
- 0238.Product of Array Except Self - Peek, suffix, right-side product