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RSS订阅原创 LeetCode 611. Valid Triangle Number
LeetCode 611. Valid Triangle Number (Medium) 主要知识点：sorting, two pointers；优先级：5
2024-06-26 15:32:29
484
原创 LeetCode 815. Bus Routes
LeetCode 815. Bus Routes (Hard) 主要知识点：BFS；优先级：5
2024-06-13 15:08:03
1283
原创 LeetCode 2848. Points That Intersect With Cars
LeetCode 2848. Points That Intersect With Cars (Easy)；主要知识点：set, line sweep；优先级：3
2024-06-13 14:13:55
738
原创 LeetCode 380. Insert Delete GetRandom O(1)
LeetCode 380. Insert Delete GetRandom O(1) (Medium) 优先级：4；主要知识点：hashmap
2024-06-04 16:34:54
731
原创 LeetCode 41. First Missing Positive
LeetCode 41. First Missing Positive (Hard) 优先级：4（扣一分是因为觉得不常用）；主要知识点：hash
2024-06-04 16:28:00
1081
原创 LeetCode 2574. Left and Right Sum Differences
LeetCode 2574. Left and Right Sum Differences (Easy) 主要知识点：prefix sum；优先级：3
2024-05-24 14:26:17
389
原创 LeetCode 1588. Sum of All Odd Length Subarrays
LeetCode 1588. Sum of All Odd Length Subarrays (Easy) 主要知识点：array，算法技巧；优先级：4
2023-09-15 15:17:04
307
原创 1413. Minimum Value to Get Positive Step by Step Sum
这道题说是从一个startValue开始，从左往右加数组里的数字，要保证每次加完这个值都不小于1。翻译过来就是，求这个数组的prefix sum最小的那个数，如果最小的就不小于1，那就return最小的startValue which is 1，如果最小的小于1，那就return (-sum) + 1。
2023-09-14 14:45:01
215
原创 LeetCode 724. Find Pivot Index / 1991. Find the Middle Index in Array
LeetCode 724. Find Pivot Index / 1991. Find the Middle Index in Array (Easy) 主要知识点；prefix sum；优先级：4
2023-09-14 14:36:22
248
原创 LeetCode 933. Number of Recent Calls
LeetCode 933. Number of Recent Calls (Easy) 主要知识点：queue；优先级：4
2023-09-13 14:06:00
204
原创 LeetCode 2073. Time Needed to Buy Tickets
LeetCode 2073. Time Needed to Buy Tickets (Easy) 主要知识点：array；优先级：4
2023-09-13 13:45:29
219
原创 LeetCode 222. Count Complete Tree Nodes
LeetCode 222. Count Complete Tree Nodes (Easy)；主要知识点：tree；优先级：5
2023-09-12 16:00:04
227
原创 2465. Number of Distinct Averages
2465. Number of Distinct Averages (Easy) 主要知识点：array, two pointers, sort, set；优先级：1
2023-09-11 15:10:16
132
原创 LeetCode 2511. Maximum Enemy Forts That Can Be Captured
LeetCode 2511. Maximum Enemy Forts That Can Be Captured (Easy) 主要知识点：array, two pointers；优先级：4
2023-09-11 14:59:12
195
原创 LeetCode 2000. Reverse Prefix of Word
LeetCode 2000. Reverse Prefix of Word (Easy) 主要知识点：string；优先级：1
2023-09-01 14:46:52
681
原创 LeetCode 1385. Find the Distance Value Between Two Arrays
LeetCode 1385. Find the Distance Value Between Two Arrays (Easy) 主要知识点：binary search；优先级：3
2023-08-31 15:58:07
611
原创 LeetCode 1768. Merge Strings Alternately
LeetCode 1768. Merge Strings Alternately (Easy) 主要知识点：array, two pointers；优先级：1
2023-08-31 14:56:06
625
原创 LeetCode 1346. Check If N and Its Double Exist
LeetCode 1346. Check If N and Its Double Exist (Easy)；主要知识点：set；优先级：2
2023-08-30 10:26:40
366
原创 LeetCode 1332. Remove Palindromic Subsequences
LeetCode 1332. Remove Palindromic Subsequences (Easy) 主要知识点：string, two pointers；优先级：1
2023-08-30 10:15:31
314
原创 LeetCode 1089. Duplicate Zeros
LeetCode 1089. Duplicate Zeros (Easy) 主要知识点：array, two pointers；优先级：4
2023-08-29 15:20:45
278
原创 LeetCode 925. Long Pressed Name
LeetCode 925. Long Pressed Name (Easy) 主要知识点：string, two pointers；优先级：4（kind of套路吧）
2023-08-29 14:46:13
350
原创 922. Sort Array By Parity II
922. Sort Array By Parity II (Easy) 主要知识点：array, two pointers；优先级：2（905变体）
2023-08-28 15:06:18
104
原创 LeetCode 917. Reverse Only Letters
LeetCode 917. Reverse Only Letters (Easy) 主要知识点：array, two pointers；优先级：2
2023-08-27 15:16:13
377
原创 LeetCode 905. Sort Array By Parity
LeetCode 905. Sort Array By Parity (Easy) 主要知识点：array, two pointer；优先级：3.5
2023-08-27 14:59:22
547
原创 LeetCode 832. Flipping an Image
LeetCode 832. Flipping an Image (Easy) 主要知识点：array；优先级：1
2023-08-26 15:45:36
354
原创 LeetCode 821. Shortest Distance to a Character
LeetCode 821. Shortest Distance to a Character (Easy) 主要知识点：string；优先级：3
2023-08-24 15:48:26
533
原创 LeetCode 696. Count Binary Substrings
LeetCode 696. Count Binary Substrings (Easy) 主要知识点：string、算法技巧；优先级：4（主要是记住解法）
2023-08-24 14:13:41
448
原创 LeetCode 557. Reverse Words in a String III
LeetCode 557. Reverse Words in a String III (Easy) 主要知识点：string；优先级：3
2023-07-11 16:00:40
229
原创 LeetCode 541. Reverse String II
LeetCode 541. Reverse String II (Easy) 主要知识点：string；优先级：3.5
2023-07-11 15:40:32
332
原创 LeetCode 1763. Longest Nice Substring
LeetCode 1763. Longest Nice Substring (Easy) 主要知识点：divide and conquer；优先级：5
2023-04-04 16:02:13
345
原创 LeetCode 1863. Sum of All Subset XOR Totals
LeetCode 1863. Sum of All Subset XOR Totals (Easy) 主要知识点：backtrack；优先级：5
2023-03-29 16:18:57
391
原创 LeetCode 401. Binary Watch
LeetCode 401. Binary Watch (Easy)；主要知识点：backtrack；优先级：5
2023-03-27 16:39:40
700
原创 LeetCode 1700. Number of Students Unable to Eat Lunch
LeetCode 1700. Number of Students Unable to Eat Lunch (Easy) 主要知识点：queue, array；优先级：4
2023-03-25 16:02:48
649
原创 LeetCode 1614. Maximum Nesting Depth of the Parentheses
LeetCode 1614. Maximum Nesting Depth of the Parentheses (Easy) 主要知识点：stack, string；优先级：2
2023-03-25 15:37:21
367
原创 LeetCode 1598. Crawler Log Folder
LeetCode 1598. Crawler Log Folder (Easy) 主要知识点：强行stack？；优先级：0
2023-03-23 15:21:05
337
原创 LeetCode 1544. Make The String Great
LeetCode 1544. Make The String Great (Easy) 主要知识点：stack, string；优先级：4
2023-03-23 15:02:17
376
原创 LeetCode 1475. Final Prices With a Special Discount in a Shop
LeetCode 1475. Final Prices With a Special Discount in a Shop (Easy) 主要知识点：stack (monotonic stack)；优先级：5
2023-03-23 14:43:03
704
原创 LeetCode 1047. Remove All Adjacent Duplicates In String
LeetCode 1047. Remove All Adjacent Duplicates In String (Easy) 主要知识点：stack, string, 2 pointers；优先级：4
2023-03-22 16:33:17
403
原创 LeetCode 844. Backspace String Compare
LeetCode 844. Backspace String Compare (Easy) 主要知识点：stack, string, 2 pointers；优先级：5
2023-03-21 16:14:41
325
原创 LeetCode 1021. Remove Outermost Parentheses
LeetCode 1021. Remove Outermost Parentheses (Easy) 主要知识点：stack, string；优先级：4
2023-03-21 15:46:19
265
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