A part of this Problem :
For every query range [L,R] (1 <= L<= R <= n) How to calculate maximum length subarray of 1 within segment [L,R].
1 <= n,query <= 100000
- n = 10
- [1, 9, 2, 3, 1, 1, 1, 4, 1, 1]
- L = 3 , R = 10
- answer = 3
# | User | Rating |
---|---|---|
1 | jiangly | 3640 |
2 | Benq | 3593 |
3 | tourist | 3572 |
4 | orzdevinwang | 3561 |
5 | cnnfls_csy | 3539 |
6 | ecnerwala | 3534 |
7 | Radewoosh | 3532 |
8 | gyh20 | 3447 |
9 | Rebelz | 3409 |
10 | Geothermal | 3408 |
# | User | Contrib. |
---|---|---|
1 | maomao90 | 173 |
2 | adamant | 164 |
3 | awoo | 161 |
4 | TheScrasse | 160 |
5 | nor | 159 |
6 | maroonrk | 156 |
7 | SecondThread | 152 |
8 | pajenegod | 146 |
9 | BledDest | 144 |
10 | Um_nik | 143 |
A part of this Problem :
For every query range [L,R] (1 <= L<= R <= n) How to calculate maximum length subarray of 1 within segment [L,R].
1 <= n,query <= 100000
Name |
---|
Segment tree.
I want to learn Sparse table. Can you give me an idea using Sparse table?
Specially for calculating the subarray part.
My English is poor...
But I will try my best.:)
st[i][j]=1 if s[i]~s[i+(1<<j)-1] all equals to 1
otherwise st[i][j]=0
so if s[i]=1,st[i][0]=1
and st[i][j]=st[i][j-1]&st[i+(1<<(j-1)][j-1]