Hello codeforces community . I am trying to solve this problem : but dont understand which topics' problem is this . Can anyone tell me ?
Is this a DP problem ?
Problem link : http://agc005.contest.atcoder.jp/tasks/agc005_b
№ | Пользователь | Рейтинг |
---|---|---|
1 | jiangly | 3976 |
2 | tourist | 3815 |
3 | jqdai0815 | 3682 |
4 | ksun48 | 3614 |
5 | orzdevinwang | 3526 |
6 | ecnerwala | 3514 |
7 | Benq | 3482 |
8 | hos.lyric | 3382 |
9 | gamegame | 3374 |
10 | heuristica | 3357 |
Страны | Города | Организации | Всё → |
№ | Пользователь | Вклад |
---|---|---|
1 | cry | 169 |
2 | -is-this-fft- | 166 |
3 | Um_nik | 161 |
3 | atcoder_official | 161 |
5 | djm03178 | 157 |
6 | Dominater069 | 156 |
7 | adamant | 154 |
8 | luogu_official | 152 |
9 | awoo | 151 |
10 | TheScrasse | 147 |
Hello codeforces community . I am trying to solve this problem : but dont understand which topics' problem is this . Can anyone tell me ?
Is this a DP problem ?
Problem link : http://agc005.contest.atcoder.jp/tasks/agc005_b
Название |
---|
range minimum query
For each index i find the biggest number r[i] such that min(a[i],..,a[r[i]])=a[i] and the smallest number l[i] such that min(a[l[i]],....,a[i])=a[i].
ans=sigma (r[i]-i+1)*(i-l[i]+1)
r[i] and l[i] can be computed with stacks in O(n).