|시간 제한||메모리 제한||제출||정답||맞은 사람||정답 비율|
|2 초||256 MB||12||7||7||58.333%|
Physicians are investigating particles of three types: x, y and z. They load a numbered row of n particles into collider. During the experiment an exposure on a concrete particle is having place, after which the particle disappears from i-th position of the row and instantly appears on position j. After disappearance of the particle numbers of particles to the right are decreased by 1 and after the appearance number of particles to the right of that place are increased by 1. After a number of exposures scientists want to know, which particle is on place k. Write program, which will help them.
The first line of the input file contains two integer numeber: n — number of particles and m — total number of exposures and queries (1 ≤ n ≤ 1000000, 1 ≤ m ≤ 15000).
In the second line there is a sequence of characters x, y and z of length n. Each of the next m lines contains exposure or query description. Line, containing an exposure, starts with character a and space and contains two integer number from interval [1; n]. First number is start position of the particle during the exposure and the second one is finish position. Line, describing a query, starts with character q and space and contains one number from interval [1; n] — position, which scientists are interested in.
Output one line for each question from input file. Line number i must contain the answer to the question i — name of the corresponding particle x, y or z.
15 6 xzxyyzxxzxyyzyx a 2 10 a 15 4 q 3 a 12 2 q 14 q 2
y z y
Note. Sequence after the first exposure — xxyyzxxzxzyyzyx, after the second — xxyxyzxxzxzyyzy, after the third — xyxyxyzxxzxzyzy.