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User's AC Ratio

NaN% (0/0)

Submission's AC Ratio

NaN% (0/0)

Tags

ICPC NWERC 2013

Description

The PDF version of this problemset can be downloaded here.

Input Format

Output Format

Sample Input 1

((B)())
((((B)(B))((B)()))(B))
(()(((B)(B))(B)))

Sample Output 1

0
impossible
1

Hints

Problem Source

Migrated from old NTUJ.

Subtasks

No.	Testdata Range	Score

Testdata and Limits

No.	Time Limit (ms)	Memory Limit (VSS, KiB)	Output Limit (KiB)	Subtasks
0	1000	262144	131072
1	1000	262144	131072

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