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There are NN different kinds of transport ships on the port. The i^{th}ith kind of ship can carry the weight of V[i]V[i] and the number of the i^{th}i 阅读全文
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Problem Description I used to think I could be anything, but now I know that I couldn't do anything. So I started traveling.The nation looks like a co 阅读全文
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After eating food from Chernobyl, DRD got a super power: he could clone himself right now! He used this power for several times. He found out that thi 阅读全文
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God Water likes to eat meat, fish and chocolate very much, but unfortunately, the doctor tells him that some sequence of eating will make them poisono 阅读全文
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Bob is a sorcerer. He lives in a cuboid room which has a length of AA, a width of BB and a height of CC, so we represent it as AA * BB * CC. One day, 阅读全文
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Now you have a string consists of uppercase letters, two integers AA and BB. We call a substring wonderful substring when the times it appears in that 阅读全文
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There are NN children in kindergarten. Miss Li bought them NN candies. To make the process more interesting, Miss Li comes up with the rule: All the c 阅读全文
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A prince of the Science Continent was imprisoned in a castle because of his contempt for mathematics when he was young, and was entangled in some math 阅读全文
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Jessie has a magic mirror. Every morning she will ask the mirror: 'Mirror mirror tell me, who is the most beautiful girl in the world?' If the mirror 阅读全文