Pls provid ethe soln

#1

pls help me solving this question
i tried a lot pls provide soln withh explanation

#2

Take a pair of centre-radius and centre+radius and sort according to the second parameter. And then calculate the number of circles. Now,try to solve.

#3

i am not able to understand what are u trying to say

#4

pls explain the logic

#5

i have seen the logic in gfg but not able to understand there and also here

#6

pls provide the soln with explanation

#7

Greedy

Analyse the given figure from what i said previously