题目描述 Consider a town where all the streets are one-way and each street leads from one intersection to another. It is also known that starting from an intersection and walking through towns streets you can never reach the same intersection i.e. the town…
链接:https://codeforces.com/contest/1304/problem/C
Gildong owns a bulgogi restaurant. The restaurant has a lot of customers, so many of them like to make a reservation before visiting it.
Gildong tries so hard to satisfy the customers that he …
Speech on trip. How much does your life weigh(多重)? Imagine for a second that you’re carrying a backpack(背一个包). I want you to feel the straps(肩带) on your shoulders. Feel them? I want you to pack it wit…