I was looking at contest 200 div.1, but problem B has no statement, it shows an empty page with the following sentence: "Statement is not available".
What's wrong?
№ | Пользователь | Рейтинг |
---|---|---|
1 | tourist | 3690 |
2 | jiangly | 3647 |
3 | Benq | 3581 |
4 | orzdevinwang | 3570 |
5 | Geothermal | 3569 |
5 | cnnfls_csy | 3569 |
7 | Radewoosh | 3509 |
8 | ecnerwala | 3486 |
9 | jqdai0815 | 3474 |
10 | gyh20 | 3447 |
Страны | Города | Организации | Всё → |
№ | Пользователь | Вклад |
---|---|---|
1 | maomao90 | 173 |
2 | awoo | 164 |
3 | adamant | 163 |
4 | TheScrasse | 160 |
5 | nor | 157 |
6 | maroonrk | 156 |
7 | -is-this-fft- | 152 |
8 | Petr | 146 |
8 | orz | 146 |
10 | pajenegod | 145 |
I was looking at contest 200 div.1, but problem B has no statement, it shows an empty page with the following sentence: "Statement is not available".
What's wrong?
Название |
---|
I can't help with this problem, but I can help you with the statements as I have solved it before. If I remember correctly, you were given a string
S
consisting of+
s and-
s, and you are to determine whether the string is valid or not. The following conditions help you determine whether or not a string is valid:S
is valid, then+S+
and-S-
are valid strings.For example strings
--
and+--+
are valid, where-+
is not.If the string is valid print
YES
, otherwise printNO
.Input limits:
|S| <= 10^5
, where|S|
is the length of the stringS
.Thanks :D
You can use Google Cache to view problem statement: http://webcache.googleusercontent.com/search?q=cache:http://codeforces.com/problemset/problem/343/B
Thanks