How many seats
Time Limit : 1 Second
Memory Limit : 128 MB
Submission: 194
Solved: 17
 Description
As we all know the winter vacation is coming soon, so train tickets are becoming hot again! (You can see the long waiting line in front of the tickets office). Fortunately our lucky xiaoY has got a ticket back home, but Mr HH who gave xiaoY the ticket placed a hard problem at the same time. Because Mr HH was working on the CRH(和谐号), he needed to know how many seats the CRH could be sold. CRH is designed in a strange way.
1st: The carriage of index i has the sum of i's all digital seats.
2nd: From the beginning of the train every 5 carriage is forbidden to take passenger.
3rd: Give you the index of headL, and index of tailR, calculate the number of seats could be sold!
Mr HH was tired of this hard math problem, so he turned this problem to xiaoY, Can you help xiaoY solve this problem to back home!
 Input
N  Case number (N<=100)
N pair of number followed
L, R  head and tail of train. (0=< L<=R<=100000000)
 Output
Sum  the total seats of CRH could be sold.
 sample input

3 3 5 8 13 1 10
 sample output

12 24 40
 hint
3 + 4 + 5 = 12
8 + 9 + (1+0) + (1+1) + (1+3) = 24 (the 5^{th} number 12 is ignored)
1 + 2 + 3 + 4 + 6 + 7 + 8 + 9 = 40 (the 5^{th} number 5 and the 10^{th} number 10 are ignored)
 source
 He Jian, HUST Campus 2010, Preliminary