In n queen n problem

#1

i dont understand to check for diagonals

#2

Hey Udit, diogonal check is necessary to see if queen attacks other queen or not. There are two types of diagonals,

  1. goes from top left to bottom right
    2 . goes from bottom left to top right.
    1st diagonal follows that difference of x and y coordinates is constant.
    2nd diagonal follows that sum of x and y is constant.
    We utilize above properties to find diagonal elements for given coordinates.
#3

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