摘要：
codeforces466C Number of Ways You've got array a[1], a[2], ..., a[n], consisting of n integers. Count the number of ways to split all the elements of 阅读全文
摘要：
codeforces158B Taxi codeforces158B Taxi After the lessons n groups of schoolchildren went outside and decided to visit Polycarpus to celebrate his bir 阅读全文