| № | Пользователь | Рейтинг |
|---|---|---|
| 1 | tourist | 4009 |
| 2 | jiangly | 3823 |
| 3 | Benq | 3738 |
| 4 | Radewoosh | 3633 |
| 5 | jqdai0815 | 3620 |
| 6 | orzdevinwang | 3529 |
| 7 | ecnerwala | 3446 |
| 8 | Um_nik | 3396 |
| 9 | ksun48 | 3390 |
| 10 | gamegame | 3386 |
| 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 | 157 |
| 8 | TheScrasse | 154 |
| 9 | Dominater069 | 153 |
| 9 | nor | 153 |
problem: https://toph.co/p/problem-number-nine-and-three-quarter solution: http://ideone.com/RYkF3m
though I solved it in two different ways. but I can't understand this solution. I tried but couldn't make a communication with the actual writer of the solution. Please help me.
Add auxiliary lines as plotted above.
Since
, lines NH and MB are parallel. Therefore 
.
Therefore
.
Not necessarily the most elegant way, but hope it helps anyway.
By the way do you know a better way(more elegant)? I solved it by solving equation for two straight line intersecting in a common point.
No, but I suppose two auxiliary lines won't overcomplicate it.