Slastičar
레이팅 미적용의견: 0
\(1^{st}\) round, September \(28^{th}\), 2013
Organizing CS contests didn't prove very lucrative for Mirko, so he has opened an ice cream and pastry
shop. The business was flourishing until, one day, the European Union health inspection decided to
pay him a visit.
A new directive specifies M banned ingredients which cannot appear in food even in trace amounts.
Each ingredient has a serial number consisting of digits 0 through 9. The declaration on each food
package lists all the serial numbers of ingredients contained in the respective food item.
Mirko must check whether any of his products has a banned ingredient serial number listed on its
declaration. However, Mirko, being inept and reckless as always, decided to concatenate all the serial
numbers into one long number with length N believing that it will make his job easier. He has
borrowed a robot from his friend Slavko. The robot is programmed to check whether a serial number
A contains another serial number B as a substring. Let us denote the length of B by L. The robot
carries out search as follows:
• First, it compares the segment of A from position 1 to position L, digit by digit, with the digits
in B. Comparison is stopped when a differing digit is found or when the segments are
determined to be equal. If the segments are equal, the search is stopped and the match
reported.
• If the segments are not equal, the procedure above is repeated with the segment from 2 to \(L+1\).
If those segments aren't equal either, the search continues with segments 3 to \(L+2\), 4 to \(L+3\)
etc.
• If the robot doesn't have a sufficient number of digits to obtain a full segment of length L (for
example, starting at character 5 in a serial number with length 8, a segment with length 6 is
needed), it will pad the number with '#' signs. For example, the segment of "563232" from
position 4 to position 10 is "232####".
• If the robot reaches the end of the serial number (having tried out all N segments) without
having found B, the absence of match is reported.
The robot takes one second for each comparison between two digits, and Slavko charges Mirko one
dollar per second for using the robot.
Help Mirko determine how much money he'll have to pay Slavko for pattern matching!
In test data worth at least 20% of total points, the following constraints hold:
• \(1 \le N \le 1000\)
• \(1 \le M \le 500\)
• length of a single banned ingredient serial number doesn't exceed 1000
The first line of input contains the positive integer N (\(1 \le N \le 100\,000\)), the length of the long serial
number.
The second line of input contains N digits from 0 to 9, the long serial number.
The third line of input contains the positive integer M (\(1 \le M \le 50\,000\)), the number of banned
ingeredients.
Each of the following M rows contains a single banned serial number,
A banned serial number will not exceed 100 000 digits in length.
The total length of all banned serial numbers will not exceed 3 000 000 digits.
Output M integers, one per line. Line \(i\) must contain the dollar amount that Mirko needs to pay Slavko
for the search for ingredient serial number \(i\).
\(1^{st}\) round, September \(28^{th}\), 2013
7
1090901
4
87650
0901
109
0907
10
3
410
5821052680
4
210526
2105
582
1052688
6
3
93
001
1
114Clarification of the first example:
First serial number: the robot finds differing first digits for every segment – a total of 7 comparisons.
Second serial number: tries first position, finding difference immediately (1 comparison). Tries second
position, finding difference on the fourth digit (4 comparisons). Tries third position, finding difference
immediately (1 comparison).Tries fourth position, finding a match (4 comparisons). Total: 10
comparisons.
Third serial number: finds match immediately (3 comparisons).
Fourth serial number: finds match at second position (1 + 3 = 4 comparisons).
Clarification of the third example:
The robot compares the serial number '11' in order with segments '00' (1 comparison), '01' (1
comparison) and '1#' (2 comparisons). Total: 4 comparisons.
평가 및 의견
Slastičar
Log in to rate problems.
아직 의견이 없습니다. 자격이 된다면 위 양식에서 가장 먼저 평가해 보세요.
풀이 제출
Slastičar