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题意及题解：判断有存在几个后面的数比前面的小；如果没有则输出0；如果有不止一个，则输出-1；如果恰有一个， 那么就需要判断a[1]和a[n]的大小关系。DescriptionOne day, Twilight Sparkle is interested in how to sort a sequen... 阅读全文
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题意：给n 求最小的x题解：二元一次方程求解，x*x+x*b-n=0 遍历bDescriptionLet's consider equation:x^2 + s(x)·x - n = 0, where x, n are positive integers, s(x) is the function,... 阅读全文
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题意：求平均值，注意精度A number of students are members of a club that travels annually to exotic locations. Their destinations in the past have included Indiana... 阅读全文
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题意：求平均每千米花的时间，注意精度和格式DescriptionA relay is a race for two or more teams of runners. Each member of a team runs one section of the race. Your task is t... 阅读全文