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1106 Lowest Price in Supply Chain (25分) A supply chain is a network of retailers(零售商), distributors(经销商), and suppliers(供应商)-- everyone involved in mo 阅读全文
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1105 Spiral Matrix (25分) This time your job is to fill a sequence of N positive integers into a spiral matrix in non-increasing order. A spiral matrix 阅读全文
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1104 Sum of Number Segments (20分) Given a sequence of positive numbers, a segment is defined to be a consecutive subsequence. For example, given the s 阅读全文