Given a number N, the task is to find the integer points (x, y) such that 0 <= x, y <= N and Manhattan distance between any two points will be atleast N.
Input: N = 3 Output: (0, 0) (0, 3) (3, 0) (3, 3) Input: N = 4 Output: (0, 0) (0, 4) (4, 0) (4, 4) (2, 2)
- Manhattan Distance between two points (x1, y1) and (x2, y2) is:
|x1 – x2| + |y1 – y2|
- Here for all pair of points this distance will be atleast N.
- As 0 <= x <= N and 0 <= y <= N so we can imagine a square of side length N whose bottom left corner is (0, 0) and top right corner is (N, N).
- So if we place 4 points in this corner then Manhattan distance will be atleast N.
- Now as we have to maximize the number of the point we have to check is there any available point inside the square.
- If N is even then middle point of the square which is (N/2, N/2) is integer point, otherwise, it will be float value as N/2 is not a integer when N is odd.
- So the only available position is the middle point and we can put a point there only if N is even.
- So number of points will be 4 if N is odd and if N is even then the number of points will be 5.
Below is the implementation of the above approach:
(0, 0) (0, 8) (8, 0) (8, 8) (4, 4)
- Find the number of points that have atleast 1 point above, below, left or right of it
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- Ways to choose three points with distance between the most distant points <= L
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- Program to calculate distance between two points in 3 D
- Find the original coordinates whose Manhattan distances are given
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