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Counting practice by Harvard Fat Chance

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Counting practice

video links

course videos part 1 part 2
my notes

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my logic is different from Emily's here

count [33, 34, ..., 97] = 97 - (33 - 1) = 97 - 32 = 65

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Emily took a different approach from lecture rule 2

A = [33, 34, ..., 97]

count B = [34, 36, 38, ... 96], can't apply rule 2, so let's transform it

count C = [17, 18, 19, ... 48], now can apply rule 2 = 48 - (17 -1)