Why is the error?

#1
#2

hello @garganshul151
value of n can be upto 10^9.
and u cannot declare array of that big size.
so use map in place of array.

#3

dont know how to use map. .

#4

also how map works here it is not key value?

#5

use n as key and answer corresponding to n as value.

#6

i have declared map inside it long,long…error is saying map doesnot name a type?

#7

refer this->