MUZIDA - Muzidabutur
Given a string S of lowercase Latin letters. You are to answer Q queries: given l and r (1 <= l <= r <= |S|), count the number of distinct non-empty subsequences of the substring S[l..r].
Input
Multiple test cases. For each test case:
The first line of input contains a string S.(|S| <= 40000). The second line contains a single integer Q (Q<= 100000). Q lines follow, each contains two space separated integers l and r.
Input terminates by EOF.
Input data is almost uniformly-random generated, the number of "large" test cases is relatively small.
Output
For each query output one line - the answer, modulo 109 + 2015.
Example
Input: aabababb 5 1 8 1 4 3 5 5 7 3 8 aaccbb 5 1 6 3 4 2 5 1 4 3 6 Output: 63 9 6 6 27 26 2 11 8 8
Added by: | Fudan University Problem Setters |
Date: | 2009-05-31 |
Time limit: | 1s |
Source limit: | 3333B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: C99 ERL GOSU JS-RHINO NODEJS PERL6 VB.NET |
Resource: | Not my own problem |