便于快速复习
分别按类别和按题号排列
53.返回最大连续子数组(含负数)的和
方法:优化后的动态规划
# 循环内
cur_val = nums[i]>0 ? cur_val+nums[i] : nums[i]
max_val = max(max_val, cur_val)
659.将有序数组拆为数值连续的子序列(长度>=3)
方法:用哈希表模拟多个单调队列
# 初始化
hasht = collections.default(list)
# 数组遍历
pre_small = hasht.get(nums[i]-1, 0)
hasht[nums[i]].append(pre_small + 1)
hasht[nums[i]-1].remove(pre_small)
# 字典遍历
return False if i<3 for list in hasht.values() for i in list
1296.将无序数组拆为数值连续的子序列(长度=k)
方法:
# 初始化
return False if len(nums) % k
count = collections.Counter(nums)
# 字典不为空时 循环
start = min(count.keys())
return False if count[num+i]<count[num] for i in range(1,k)
count[num+i] -= count[num] for i in reversed(range(k,-1))
2020.02计划:
周中每天刷10道题
周末不刷题,只做总结和复习
2020.03计划:
每天上午做总结和复习1小时刷题3小时
2.12 Wed. 未分类 [7]
- 1. Two Sum
- 15. 3Sum
- 26. Remove Duplicates from Sorted Array
- 80. Remove Duplicates from Sorted Array II
- 83. Remove Duplicates from Sorted List
- 844. Backspace String Compare
- 977. Squares of a Sorted Array
2.13 Thur. 滑动窗口 [10/10] 已完成
- 82. Remove Duplicates from Sorted List II
- Google | Remove Duplicates from Unsorted Array
- 316. Remove Duplicate Letters
- 360. Sort Transformed Array
- 16. 3Sum Closest
- 259.ThreeSumSmaller
- 713. Subarray Product Less Than K
- 152. Maximum Product Subarray
- 325. Maximum Size Subarray Sum Equals k
- 560. Subarray Sum Equals K
2.14 Fri. 有序数组多指针 [6/10]
- 1099. Two Sum Less Than K
- 198. House Robber
- 213. House Robber II
- 337. House Robber III
- 256. Paint House
- 265. paint house ii
- 238. Product of Array Except Self
- 628. Maximum Product of Three Numbers
- 974. Subarray Sums Divisible by K
- 75. Sort Colors
2.17 Mon. 快慢指针 [10/10] 已完成
- 141. Linked List Cycle
- 142. Linked List Cycle II
- 234. Palindrome Linked List
- 457. Circular Array Loop
- 918. Maximum Sum Circular Subarray
- 202. Happy Number
- 876. Middle of the Linked List
- 143. Reorder List
- 287. Find the Duplicate Number
- 160. Intersection of Two Linked Lists
2.18 Tue. 快慢指针 [10/10] 已完成
- 206. Reverse Linked List
- 92. Reverse Linked List II
- 156. Binary Tree Upside Down
- 268. Missing Number
- 41. First Missing Positive
- 136. Single Number
- 263. Ugly Number
- 258. Add Digits
- 599. Minimum Index Sum of Two Lists
- 645. Set Mismatch
3.17 Tues. 区间合并 [13] 好难啊啊啊梦魇(update:打败了梦魇)
-
729. My Calendar I (判断某区间是否与其它区间重合)
-
731. My Calendar II (判断某区间是否同时与其它k个区间重合)
-
252. Meeting Rooms I (判断多个区间中是否存在区间重合)
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253. Meeting Rooms II (多个区间的重合区间个数)
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732. My Calendar III (多个区间的重合区间个数)
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56. Merge Intervals 区间合并
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57. Insert Interval 区间插入
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986. Interval List Intersections 区间交集
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435. Non-overlapping Intervals 计算最小删区间个数使不重合
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218. The Skyline Problem 区间的附加属性值(e.g.第三维高度)
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621. Task Scheduler 最小化区间总长度(...)
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207. Course Schedule 判断课程安排是否存在冲突?
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636. Exclusive Time of Functions 计算每个区间的无重合长度
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