[HackerEarth] It is a nice winter Sunday morning and AltF4, our hero, decides to play a new video game. The game is called Appearism. There are a total of N beetles in the game that are initially peep - P22271

题目描述

It is a nice winter Sunday morning and AltF4, our hero, decides to play a new video game. The game is called Appearism. There are a total of N beetles in the game that are initially peeping out of the grooves to look for a chance to tease you.Each one appears out of their groves at an absolute time Pi, tease AltF4 for a time duration and then go back to their groves and sleep forever at time Qi.

AltF4 has just got one shot of the nuclear weapon that ha can use to destroy all the beetles. Being very clever, he has noted down the (Pi, Qi) for each of the beetles. He also observed that the beetles are hurt by a amount A when they are looking for a chance to tease you in the groove (i.e. when time is < Pi), by B when they are out of their grooves teasing you (between Pi, Qi) and by C when they are back into the grooves and sleeping forever (when time is > Qi). Obviously B is always greater than both A and C. AltF4 being poor in math and computing asks you for favor.

Input & Output
The first line contains the number of times AltF4 plays the game T. Then the description of T games follow. In each game description, the first line contains four space separated integers N A B C. Then N lines follow with two space separated integers P Q, the recorded value of their hideouts. Each Q will always be ≥ corresponding P

NOTE : Large Input files. Use faster IO.
For each test game, you are to print one number in a line, the maximum destruction that AltF4 can achieve. Remember that he may use the nuclear gun only at one instant of time.

Constraints
T ≤ 50
1 ≤ N ≤ 20000
0 ≤ P, Q, A, B, C ≤ 10^9

SAMPLE INPUT
2
2 1 5 3
3 4
4 5
3 1 5 3
3 4
5 5
6 6

SAMPLE OUTPUT
10
11

Explanation

1) In the first test case, he could use the weapon at time = 4. Both are out of their grooves and he can score 10 points.
2) In the second case, he can destroy one of the beetles when they are out of their grooves at max and score 5 points.

输入格式

见题面

输出格式

见题面

样例输入

1
999999999 1000000000 999999999
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样例输出

467488618077
448073384539
781173347094
604272380552
1203221697874
1093563334160
215980682215
860506440856
487919935534
963932748441
951545985885
629285781213
717715319804
642605157906
1195753928801
204135865923
1153145628052
739930053600
932230784652
1107833344837
558704578441
879950130299
797429429476
1103728641556
447324785842
1085844000277
835083689474
1144075217003
1079368516589
426840935862
966598688954
547039361113
633229382634
848471827866
1101046329577
766110228945
415175257958
184347607266
666390661139
981906727224
558795764388
671741031858
799569272583
763202988628
840649802089
1051162704808
856269072361
255528679605
798910722658
1135244767580

时间限制	2000 ms
内存限制	256 MB
难度	普及-
提交数	0
通过数	0
通过率	0.0%

P22271 [HackerEarth] It is a nice winter Sunday morning and AltF4, our hero, decides to play a new video game. The game is called Appearism. There are a total of N beetles in the game that are initially peep

题目描述

输入格式

输出格式

样例输入

样例输出