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Time limit 1000/1000/4000/4000 ms. Memory limit 65000/65000/65000/65000 Kb.
Problem Description
You are given a sequence of round, square and curly brackets. Determine whether it is correct or not.
Input
There is a sequence of round ('(', ')'), square ('[', ']') and curly ('{', '}') brackets in a single line of input. The length of sequence is between 1 and 255.
Output
Write YES to output if the sequence is correct, and NO otherwise.
Example
| input |
output |
([]) |
YES |
| (({)}) |
NO |
Для отправки решений необходимо выполнить вход.
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