740. Delete and Earn
740. Delete and Earn
這個題目從題目本身的敘述其實滿容易猜到解法是透過動態規劃求解，比較困難的是要找到符合動態規劃的子問題。
題目給的條件是如果選定一個數字 k，其中如果有 n
LeetCode
1137. N-th Tribonacci Number
1137. N-th Tribonacci Number
自頂向下
class Solution:
def tribonacci(self,
746. Min Cost Climbing Stairs
746. Min Cost Climbing Stairs
class Solution:
def minCostClimbingStairs(self,
Kth Smallest Element in a Sorted Matrix
378. Kth Smallest Element in a Sorted Matrix
題目的要求是找到在一個排序好的組合矩陣中，找到第
141. Linked List Cycle
141. Linked List Cycle
# Definition for singly-linked list.
# class ListNode:
1046. Last Stone Weight
1046. Last Stone Weight
class Solution:
def lastStoneWeight(self, stones:
703. Kth Largest Element in a Stream
703. Kth Largest Element in a Stream
class KthLargest:
def
215. Kth Largest Element in an Array
215. Kth Largest Element in an Array
需要透過 heap 來實作
707. Design Linked List
707. Design Linked List
class ListNode:
def __init__(self, x)
147. Insertion Sort List
147. Insertion Sort List
通常的排序問題都是問的是陣列的排序，這個題目的要求卻是使用鏈結串列 Linked List 。
題目的解法其實很直覺，從給定的陣列中一每次選擇一個數字，