SPEED - Circular Track

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Two persons are running on a circular track either in the same direction or in the opposite direction, indefinitely. The speed of both of them is given to you. Speed will be positive in clockwise direction, and negative in anticlockwise direction. Print the number of distinct points, at which they will meet on the circle.


First line contains T, number of test cases. Each test case contains two integers, S1 and S2 (not equal to zero) which are the speeds of the two persons. S1 and S2 will be distinct.

Edited: All the numbers fit in signed 32-bit integer.


Print in a separate line, the number of distinct points at which they meet.


1 2
1 -1


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deerawat: 2020-12-27 18:11:56

Good question!

a_l_o_n_e: 2019-09-04 15:44:25

AC in one go 0.00 s

pandey101299: 2019-04-02 15:38:01

only gcd and relative motion apply

satish18: 2019-01-26 18:13:10


vivek_dwivedi: 2018-07-03 07:26:08

do these type of questions when you need confidence !

raichu7: 2017-08-22 19:43:30

AC in one go :)

kooljais24: 2017-06-19 23:23:26

AC in one go....my 100th

viratian_070: 2017-06-17 16:43:18

just observe....very nice problem....

ankit1cool: 2017-06-13 15:43:49

Those getting WA check that when both s1 and s2 is negative then they are in same direction

vanvinhbk94: 2017-02-24 04:18:01

AC in one go :))

Added by:Nikunj Jain
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)