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Home (/) » Compete (/contests/) » Algomaniac Prelims (/AGPR2020?order=desc&sortBy=successful_submissions) » Pair It
Pair It
Problem Code: ALPR2002
Submit (/AGPR2020/submit/ALPR2002)
You are given a set X containing N unique integers, x1 , x2 , . . . , x, nand a set Y
containing N unique integers, y1 , y2 , … , y. nSet S is formed by pairing each element
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of set X with an element of set Y, which has not been paired already, to form the set
of points (xi, yj ). Find the number of ways of forming set S so that all the points in
Successful Submissions

the set lie on a straight line in a Cartesian plane.
Input:
First line will contain T, number of testcases. Then the testcases follow.
First line of each testcase contains an integer N.
The next line contains N space-separated integers x1 , x2 , . . . , x. n
The last line contains N space-separated integers y1 , y2 , … , y. n
Output:
For each test case, print a single line containing one integer ― the number of
possible combinations.
Constraints
1 ≤ T ≤ 100
5
2 ≤ N ≤ 2 ∗ 10
9
−10
9
−10
9
≤ xi ≤ 10
9
≤ yi ≤ 10
Elements of set X and Y are unique.
Sample Input:
1
3
1 2 3
1 2 3
Sample Output:
2
EXPLANATION:
This number of ways of forming set S are:
[(1, 1), (2, 2), (3, 3)], [(1, 1), (2, 3), (3, 2)],
. Number of set S forming a straight
[(1, 2), (2, 3), (3, 1)], [(1, 2), (2, 1), (3, 3)],
[(1, 3), (2, 2), (3, 1)], [(1, 3), (2, 1), (3, 2)]
line is 2.
Author:
★ mazumder7 (/users/mazumder7)
4
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Time Limit:
1.5 secs
Source Limit: 50000 Bytes
Languages:
C, CPP14, JAVA, PYTH, PYTH 3.6, PYPY, CPP17, PYP3
Submit (/AGPR2020/submit/ALPR2002)
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