so i was solving a cses question and i had a confusion...why dont we sort a set or multiset before applying lower bound and upper bound? i saw some solutions and they just simply added the elements and directly applied lower bound and upper bound.
so i was solving a cses question and i had a confusion...why dont we sort a set or multiset before applying lower bound and upper bound? i saw some solutions and they just simply added the elements and directly applied lower bound and upper bound.
| № | Пользователь | Рейтинг |
|---|---|---|
| 1 | tourist | 3845 |
| 2 | jiangly | 3707 |
| 3 | Benq | 3630 |
| 4 | orzdevinwang | 3573 |
| 5 | Geothermal | 3569 |
| 5 | cnnfls_csy | 3569 |
| 7 | jqdai0815 | 3532 |
| 8 | ecnerwala | 3501 |
| 9 | gyh20 | 3447 |
| 10 | Rebelz | 3409 |
| Страны | Города | Организации | Всё → |
| № | Пользователь | Вклад |
|---|---|---|
| 1 | maomao90 | 171 |
| 2 | adamant | 163 |
| 3 | awoo | 161 |
| 4 | maroonrk | 152 |
| 4 | nor | 152 |
| 6 | -is-this-fft- | 151 |
| 7 | TheScrasse | 148 |
| 8 | atcoder_official | 146 |
| 9 | Petr | 145 |
| 10 | pajenegod | 144 |
It's because they are sorted data structures. You might want to read the references for these containers on Cppreference.
Sorted data structures = Already sorted right? also why do they have a separate lower bound and upper bound function. why not use the std:lowerbound and upperbound?
Oh, so you were asking for why they had their own member function. You can refer to the functions' reference for this, see the reference for std::lower_bound, especially the section labeled Complexity.