Problem 2 – 0:35Problem 3 – 1:51Problem 4 – 3:00Problem 5 – 3:42Problem 6 – 6:15Problem 7 – 8:10Problem 8 – 9:53Problem 9 – 11:57Problem 10 – 12:30Problem 11 – 13:19Problem 12 – 14:55
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