What is the meaning of constraints?

in the above link the constraints are given. please explain me that how to take care of the constraints while coding so that i may not violate the constraints and get my code submitted…

hello @Anku47

u need to use constraints to decide following things->
a) time complexity .
u time complexity should be < alloted time limit * 10^8

b) decide type if constaint are huge use long long otherwise use int

c) space complexity
space complexity of ur solution < alloted space in problem

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