Alice'spresent
Time Limit: 5 Seconds Memory Limit: 65536 KB
As a doll master, Alice owns a wide range of dolls, and each ofthem has a number tip on it's back, the tip can be treated as apositive integer. (the number can be repeated). One day, Alicehears that her best friend Marisa's birthday is coming , so shedecides
to sent Marisa some dolls for present. Alice puts her dollsin a row and marks them from 1 to
n. Each time Alicechooses an interval from i to j in thesequence ( include
i......
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