深度碎片
# Multinomials ### key questions > how to understand the kind of problems multinomials try to tackle? ### Video links > [Bilibili](https://www.bilibili.com/video/av27939219/?p=25) > > [my note videos](https://www.bilibili.com/video/av28177424/?p=25) p25-26 ### Problems...
# Applications of Collections ### Video links > [Bilibili](https://www.bilibili.com/video/av27939219/?p=22) > > [my note videos](https://www.bilibili.com/video/av28177424/?p=21) p21-24 ### Start problem >  > >  > > #### Experiment > > -...
# Counting Collections ### Keywords > sequences, collections ### Video links > [Bilibili](https://www.bilibili.com/video/av27939219/?p=16) > > [my notes videos](https://www.bilibili.com/video/av28177424/?p=17) p17-19 ### Key questions > how to count sequences (a group of...
# Interlude Binomial Coefficient optional ### keywords ### Video links > [Bilibili](https://www.bilibili.com/video/av27939219/?p=19) > > [my note videos](https://www.bilibili.com/video/av28177424/?p=20) ### Key questions > What interesting about binomial coefficient? ### Binomial theorem >...
# The subtraction principle ### Video links > [Bilibili](https://www.bilibili.com/video/av27939219/?p=13) > [my notes videos](https://www.bilibili.com/video/av28177424/?p=13) p13-p16 ### What and why subtraction >  > >  > > #### why subtraction useful?...
# Multiplication Rule ### keywords > multiplication rule ### video links > [bilibili](https://www.bilibili.com/video/av27939219/?p=7) > [my notes part 1-5](https://www.bilibili.com/video/av28177424/?p=5) p5-p9 ### key questions > what multiplication rule is for compared with...
# Large Numbers ### keywords > large numbers, scientific notations, exponential notation ### video links > [Bilibili](https://www.bilibili.com/video/av27939219/?p=5) > [my notes](https://www.bilibili.com/video/av28177424/?p=4) ### key questions > How to manipulate large numbers? ##...
# Counting practice ### video links > course videos [part](https://www.bilibili.com/video/av27939219/?p=3) 1 [part](https://www.bilibili.com/video/av27939219/?p=4) 2 > [my notes](https://www.bilibili.com/video/av28177424/?p=3)  my logic is different from Emily's here > count [33, 34, ..., 97]...
# Counting ### video link > [Bilibili](https://www.bilibili.com/video/av27939219/?p=2) > [my notes](https://www.bilibili.com/video/av28177424/?p=2) ### Keywords > counting, rule 1 and rule 2 derived from finger with transformation, ### Counting and probability > probability...
# Introduction ### video link > [Bilibili](https://www.bilibili.com/video/av27939219/?p=1) > [my video](https://www.bilibili.com/video/av28177424/?p=1) ## Problem starter > tossing 6 coins or tossing 1 coin 6 times,  ## How to think of such...