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Description 现在我们有一个长度为n的整数序列A。但是它太不好看了，于是我们希望把它变成一个单调严格上升的序列。 但是不希望改变过多的数，也不希望改变的幅度太大。 solution 正解：DP 这题相当诡异. 首先是一个套路，转化严格递增为不降，我们只需要把序列中的每一个元素都变为 $a[ 阅读全文
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Description A supermarket in Tehran is open 24 hours a day every day and needs a number of cashiers to fit its need. The supermarket manager has hired 阅读全文
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Description The galaxy war between the Empire Draco and the Commonwealth of Zibu broke out 3 years ago. Draco established a line of defense called Gro 阅读全文
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Description You have been given a matrix CN M, each element E of CN M is positive and no more than 1000, The problem is that if there exist N numbers 阅读全文