Why the answer is 16 but not 8 in Example 1? I can only figure out the 8 strings below
- B AAAAAAA ABBABAB
- B AAAAAAA ABBABBA
- B AAAAAAA ABABBAB
- B AAAAAAA ABABBBA
- B ABBABAB AAAAAAA
- B ABBABBA AAAAAAA
- B ABABBAB AAAAAAA
- B ABABBBA AAAAAAA
№ | Пользователь | Рейтинг |
---|---|---|
1 | tourist | 3993 |
2 | jiangly | 3743 |
3 | orzdevinwang | 3707 |
4 | Radewoosh | 3627 |
5 | jqdai0815 | 3620 |
6 | Benq | 3564 |
7 | Kevin114514 | 3443 |
8 | ksun48 | 3434 |
9 | Rewinding | 3397 |
10 | Um_nik | 3396 |
Страны | Города | Организации | Всё → |
№ | Пользователь | Вклад |
---|---|---|
1 | cry | 167 |
2 | Um_nik | 163 |
3 | maomao90 | 162 |
3 | atcoder_official | 162 |
5 | adamant | 159 |
6 | -is-this-fft- | 158 |
7 | awoo | 155 |
8 | TheScrasse | 154 |
9 | Dominater069 | 153 |
10 | nor | 152 |
Why the answer is 16 but not 8 in Example 1? I can only figure out the 8 strings below
Название |
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I think you misinterpreted $$$s_i$$$ and the input. I recommend reading the definition of $$$s_i$$$ and the input again. "B ABBABAB AAAAAAA" is not a valid constellation. The children of $$$s_1$$$ are $$$s_2$$$ and $$$s_3$$$, not $$$s_2$$$ and $$$s_9$$$.
What could've lead to this confusion: The preorder string of input "BAAAAAAAABBABAB" is not "BAAAAAAAABBABAB".
oh, thank you for explaining it to me, i've been confused about this for hours..