I am not able to make array of size 10^7 , everything else is right

#1

https://ide.codingblocks.com/s/233230… with 10^6 it is working fine but with 10^7 it is showing error… plz help

#2

since 10^7 is too big i.e range of numbers is bigger than total number of unique numbers it is recommended to use map
Code using map