String HDU-6572
Because of selecting the same character is allowed, so the probability of one character is
Because of selecting the same character is allowed, so the probability of one character is
There is a fuzzy point in the description. That is all the car has to wait the same amount of time. For example,
This is a rounding problem. Since it has only three number after the point, you just need to find the last number n and if it's more than four...
This problem is gcd or lcm problem.
There are mainly three ways of binary tree traversal. In-order, Preorder and Post-order.
For example we have a simple three-node tree like this.
Assume that we have a bunch of points, each point has a number means the occurrence times of the point.
I’ve been studying Data Structure for a while and now I sum up some knowledges.
The core of the problem is Dichotomy which is Binary search the best range of the X.
For me, the core of the problem is to figure out how the matches carry on exactly. It's the hardest part for me.
Position of the house can be divided into two situation, Uphill slope and Downhill slope. And the two situations are used to calculate the Y position of the house.