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120. Triangle Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. For example 阅读全文
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119. Pascal's Triangle II Given a non-negative index k where k ≤ 33, return the kth index row of the Pascal's triangle. Note that the row index starts 阅读全文
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118. Pascal's Triangle Given a non-negative integer numRows, generate the first numRows of Pascal's triangle. In Pascal's triangle, each number is the 阅读全文