Check whether two given lines are orthogonal or not.
Two lines are orthogonal if they create a right angle at their intersections.
here (x1,y1) and (x2,y2) form a line.
All your base are belong to us
Check if number exists in vector
Generate a string like abbcccddddeeeee
Given area find sides
Rotate a matrix without using rot90
Queen's move - 02
How lucky r u ?
The length of the equal sides of an isoceles triangle is 'a'.For all the possible (integer) values of the remaining side,find the associated angles between the two equal sides.
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