2405: Mike and Friends
Time Limit: 2 Sec Memory Limit: 256 MBSubmit: 0 Solved: 0
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Description
What-The-Fatherland is a strange country! All phone numbers there are strings consisting of lowercase English letters. What is double strange that a phone number can be associated with several bears!
In that country there is a rock band called CF consisting of n bears (including Mike) numbered from 1 to n.
Phone number of i-th member of CF is si. May 17th is a holiday named Phone Calls day. In the last Phone Calls day, everyone called all the numbers that are substrings of his/her number (one may call some number several times). In particular, everyone called himself (that was really strange country).
Denote as call(i,j) the number of times that i-th member of CF called the j-th member of CF.
The geek Mike has q questions that he wants to ask you. In each question he gives you numbers l,r and k and you should tell him the number
The first line of input contains integers n and q (1≤n≤2×105 and 1≤q≤5×105).
The next n lines contain the phone numbers, i-th line contains a string si consisting of lowercase English letters (
).
The next q lines contain the information about the questions, each of them contains integers l,r and k (1≤l≤r≤n and 1≤k≤n).
Print the answer for each question in a separate line.
5 5
a
ab
abab
ababab
b
1 5 1
3 5 1
1 5 2
1 5 3
1 4 5
7
5
6
3
6