为什么第四个样例
BABBABABBABBA 为 5?
BABBABABBABBA
5
BABBABABBABBA -> BABABABBABBA -> BABABABABBA -> BABABABABA -> BA
BABABABBABBA
BABABABABBA
BABABABABA
BA
难道不是 2 么?
2
如错,请轻喷