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You are asked to write a program that calculates the total time of a student that he/she used at least one PC in a given time period (probably in a laboratory class) based on the records in the file.
The following are example login/logout records.
The input is a sequence of a number of datasets. The end of the input is indicated by a line containing two zeros separated by a space. The number of datasets never exceeds 10.
Each dataset is formatted as follows.
N M
r
record1
...
recordr
q
query1
...
queryq
The numbers N and M in the first line are the numbers of PCs and the students, respectively. r is the number of records. q is the number of queries. These four are integers satisfying the following.
1 ≤ N ≤ 1000, 1 ≤ M ≤ 10000, 2 ≤ r ≤ 1000, 1 ≤ q ≤ 50
Each record consists of four integers, delimited by a space, as follows.
t n m s
s is 0 or 1. If s is 1, this line means that the student m logged in to the PC n at time t . If s is 0, it means that the student m logged out of the PC n at time t . The time is expressed as elapsed minutes from 0:00 of the day. t , n and m satisfy the following.
540 ≤ t ≤ 1260, 1 ≤ n ≤ N , 1 ≤ m ≤ M
You may assume the following about the records.
Each query consists of three integers delimited by a space, as follows.
ts te m
It represents "Usage of the student m between ts and te ". ts , te and m satisfy the following.
540 ≤ ts < te ≤ 1260, 1 ≤ m ≤ M
For each query, print a line having a decimal integer indicating the time of usage in minutes. Output lines should not have any character other than this number.
4 2 10 775 1 1 1 780 4 2 1 790 2 1 1 800 2 1 0 810 3 1 1 820 1 1 0 825 3 1 0 860 1 1 1 870 4 2 0 880 1 1 0 1 780 870 1 13 15 12 540 12 13 1 600 12 13 0 650 13 15 1 660 12 15 1 665 11 13 1 670 13 15 0 675 11 13 0 680 12 15 0 1000 11 14 1 1060 12 14 1 1060 11 14 0 1080 12 14 0 3 540 700 13 600 1000 15 1000 1200 11 1 1 2 600 1 1 1 700 1 1 0 5 540 600 1 550 650 1 610 620 1 650 750 1 700 800 1 0 0
55 70 30 0 0 50 10 50 0
时间上限 | 内存上限 |
2000 | 65536 |