摘要：
Problem Statement Problem Cameron and Jamie's kid is almost 3 years old! However, even though the child is more independent now, scheduling kid activi 阅读全文
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Problem Statement Problem tl;dr: Given a string of digits S, insert a minimum number of opening and closing parentheses into it such that the resultin 阅读全文
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Problem Statement Problem Vestigium means "trace" in Latin. In this problem we work with Latin squares and matrix traces. The trace of a square matrix 阅读全文