Huifeng Guan

【每日一题】LeetCode 2571. Minimum Operations to Reduce an Integer to 0

【每日一题】LeetCode 307. Range Sum Query - Mutable

【每日一题】1234. Replace the Substring for Balanced String, 9/12/2020

【每日一题】4. Median of Two Sorted Arrays, 10/12/2019

【每日一题】LeetCode 53. Maximum Subarray

【每日一题】LeetCode 2484. Count Palindromic Subsequences

【每日一题】LeetCode 2653. Sliding Subarray Beauty

【每日一题】LeetCode 2571. Minimum Operations to Reduce an Integer to 0

【每日一题】LeetCode 2646. Minimize the Total Price of the Trips

【每日一题】154. Find Minimum in Rotated Sorted Array II, 10/13/2019

【每日一题】255. Verify Preorder Sequence in Binary Search Tree, 6/10/2020

【每日一题】LeetCode 31. Next Permutation

【每日一题】LeetCode 556. Next Greater Element III

【每日一题】LeetCode 853. Car Fleet

【每日一题】LeetCode 2718. Sum of Matrix After Queries

【每日一题】LeetCode 2612. Minimum Reverse Operations

【每日一题】LeetCode 2791. Count Paths That Can Form a Palindrome in a Tree

残酷小讲座 : CodeForces 杂题选讲 2 - by zzr

【每日一题】LeetCode 3049. Earliest Second to Mark Indices II

【每日一题】LeetCode 3017. Count the Number of Houses at a Certain Distance II

【每日一题】LeetCode 2659. Make Array Empty

【每日一题】LeetCode 2680. Maximum OR

【每日一题】LeetCode 828. Count Unique Characters of All Substrings of a Given String

【每日一题】LeetCode 2713. Maximum Strictly Increasing Cells in a Matrix

【每日一题】LeetCode 2702. Minimum Operations to Make Numbers Non-positive

【每日一题】1143. Longest Common Subsequence, 3/30/2020

【每日一题】1019. Next Greater Node In Linked List, 5/22/2020

Ask Me Anything

【每日一题】LeetCode 440. K-th Smallest in Lexicographical Order

【每日一题】LeetCode 320. Generalized Abbreviation

【每日一题】LeetCode 2845. Count of Interesting Subarrays

【每日一题】1203. Sort Items by Groups Respecting Dependencies, 7/22/2020

【每日一题】718. Maximum Length of Repeated Subarray, 7/2/2020

【每日一题】LeetCode 2709. Greatest Common Divisor Traversal

【每日一题】LeetCode 564. Find the Closest Palindrome

【每日一题】LeetCode 2736. Maximum Sum Queries

【每日一题】LeetCode 3009. Maximum Number of Intersections on the Chart

【每日一题】LeetCode 2699. Modify Graph Edge Weights

【每日一题】LeetCode 2031. Count Subarrays With More Ones Than Zeros

【每日一题】LeetCode 2211. Count Collisions on a Road

【每日一题】LeetCode 2712. Minimum Cost to Make All Characters Equal

【每日一题】LeetCode 2638. Count the Number of K-Free Subsets

【每日一题】LeetCode 2577. Minimum Time to Visit a Cell In a Grid

【每日一题】1802. Maximum Value at a Given Index in a Bounded Array, 3/27/2021