after thinking for 2 hours i cant solve this problem https://codeforces.com/edu/course/2/lesson/9/1/practice/contest/307092/problem/C can someone help me?
after thinking for 2 hours i cant solve this problem https://codeforces.com/edu/course/2/lesson/9/1/practice/contest/307092/problem/C can someone help me?
№ | 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 | 174 |
2 | awoo | 164 |
3 | adamant | 163 |
4 | TheScrasse | 159 |
5 | nor | 157 |
6 | maroonrk | 155 |
7 | -is-this-fft- | 152 |
8 | Petr | 146 |
8 | orz | 146 |
10 | BledDest | 145 |
Название |
---|
Create a count map for array $$$b$$$, say $$$cnt$$$. Then iterate over $$$a$$$ and for each $$$a_i$$$, $$$ans$$$ is increased by $$$cnt[a_i]$$$. cmiiw!
Thanks a lot, it really helped me