AtCoder-4297 Monsters Battle Royale
Seeing the operation, we can easily think of Euclidean algorithm which is the way to calculate GCD.
Seeing the operation, we can easily think of Euclidean algorithm which is the way to calculate GCD.
The biggest answer is that after the operation the number can remain it self.
If you have three numbers 1, 2, 3 and want the length of the consecutive subsequence be two, the answer is 3-2+1, because you can choose 1, 2 or 1, 3.
The pre-knowledges you should know is priority of operator. Priority is the rule that determines when we meet two operators, which to calculate first. Like 3+2*5, we calculate 2 * 5 first.
The priority of operators are:
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.