BTCODE_A - Traversing Grid
Given 2 points in 2 dimensional space (xs, ys) and (xd, yd), your task is to find whether (xd, yd) can be reached from (xs, ys) by making a sequence of zero or more operations.
From a given point (x, y), the operations possible are:
- Move to point (y, x)
- Move to point (x, -y)
- Move to point (x + y, y)
- Move to point (2 * x, y)
Input
The first line of input contains T, the number of test cases. T lines follow, one for each test case. For each test case, the input contains one line denoting the 4 integers xs, ys, xd, yd
Output
Output T lines, one for each test case. For each test case, output "YES" if (xd, yd) is reachable from (xs, ys) and "NO" otherwise. (quotes for clarity)
Example
Input: 1 1 1 2 2 Output: YES
Constraints
T <= 25
-10^10 <= xs, ys, xd, yd <= 10^10
Note that, although the input values are constrained by the above inequality, the coordinates of the points at the intermediate steps need not be.
Explanation
Test case 1: We can move in the following manner: (1,1) → (2,1), using the operation (x, y) → (2 * x, y). Then, move from (2, 1) → (1, 2), using the operation (x, y) → (y, x). Finally use the operation (x, y) → (2 * x, y) to move from (1, 2) → (2, 2).
hide comments
nadstratosfer:
2018-06-07 01:51:48
Taking the usual suspects lightly costed me 40mins of staring at the screen wondering WTF. Good problem, fun to visualize and figure out. |
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Piyush Kumar:
2016-06-11 15:22:49
Can somebody provide more test cases?
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5star:
2014-06-25 21:35:00
Great question :) |
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Amit Kumar:
2012-09-02 15:20:51
Tricky test cases please...
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Ajey Golsangi:
2012-01-13 15:44:39
Good one. |
Added by: | suhash |
Date: | 2011-02-26 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
Resource: | Bytecode 2011, NIT Trichy, India |