Question: Example. Suppose there are two apartments: the first takes time t 1 = 2 0 minutes and has rank r 1 = 8 , while

Example. Suppose there are two apartments: the first takes time t1=20 minutes and has
rank r1=8, while the second apartment takes time t2=50 minutes and has rank r2=4.
Then cleaning apartment 1 first would yield a weighted finishing time of 20**8+(20+50)**4
=160+280=540. while cleaning the second apartment first would yield the larger
weighted finishing time of 50**4+(50+20)**8=200+560=760.
Note: to prove that your greedy strategy yields the optimal solution, you have to prove that
the problem has the greedy-choice property.
Example. Suppose there are two apartments: the

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