There is a sequence of brackets, which supports two kinds of operations.
we can choose a interval [l,r], and set all the elements range in this interval to left bracket or right bracket.
we can...
Link
http://acm.hust.edu.cn/vjudge/contest/121539#problem/C
Description
standard input/output
After a long ACM training day, Master Hasan invited his trainees for a light dinner in the cafeteria. T...