cf/mirror

A, B, AB and BA

CF
2069E2300· international master2s256 MB⌨ stdin/stdout

Examples

Sample 1of 1
Input
7
A
0 0 10 10
B
0 1 0 0
ABA
0 0 1 1
ABBABAAB
5 5 0 0
ABABBAABBAAB
1 1 2 3
ABBBBAB
0 3 2 0
BAABBA
1 3 2 0
Output
NO
YES
NO
YES
YES
YES
NO
2069E.cpp
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Ln 11·137 BGNU C++20 (64)