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Dynamic Programming: Problem Solving
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Digit DP
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Getting Started
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Digit DP
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1
Introduction to Digit DP Problems
2
Template Overview
3
The Digit DP Template
4
Problem - Counting Numbers
5
Counting Numbers - State Design
6
Counting Numbers - Implementation
7
Counting Numbers - Complexity
8
Lessons from Counting Numbers
9
Problem - Number of Digit One
10
Digit One - Positional Counting
11
Digit One - Implementation
12
Digit One - Time and Space
13
Lessons from Digit One
14
Quiz: Digit DP States
15
Problem - Classy Numbers
16
Classy Numbers - State Design
17
Classy Numbers - Transition
18
Classy Numbers - Implementation
19
Lessons from Classy Numbers
20
Problem - Roman and Numbers
21
Roman and Numbers - Why Naive Fails
22
Roman and Numbers - Bitmask with Remainder
23
Roman and Numbers - Implementation
24
Lessons from Roman and Numbers
25
Quiz: Bitmask in Digit DP
26
Problem - Magic Numbers
27
Magic Numbers - Position-Dependent Rules
28
Magic Numbers - Implementation
29
Magic Numbers - Complexity
30
Magic Numbers - Time and Space
31
Lessons from Magic Numbers
32
Problem - Palindromic Numbers
33
Palindromic Numbers - Half Freedom
34
Palindromic Numbers - Implementation
35
Lessons from Palindromic Numbers
36
Quiz: Palindrome Constraints
37
Problem - Segment Sum
38
Segment Sum - Tracking Both Count and Sum
39
Segment Sum - Sum Tracking
40
Segment Sum - Implementation
41
Segment Sum - Time and Space
42
Lessons from Segment Sum
43
Problem - Beautiful Numbers
44
Beautiful Numbers - The LCM Trick
45
Beautiful Numbers - LCM Trick
46
Beautiful Numbers - Implementation
47
Beautiful Numbers - Time and Space
48
Lessons from Beautiful Numbers
49
Quiz: Advanced Techniques
50
Problem - Daniel and Spring Cleaning
51
Spring Cleaning - Binary Digit DP
52
Spring Cleaning - Implementation
53
Spring Cleaning - Complexity
54
Lessons from Spring Cleaning
55
Common Mistakes in Digit DP
56
Quiz: Final Assessment
57
What's Next
58
Section Recap
8.1
Introduction to Digit DP Problems
3 minutes
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