I want to know till which no. should i calculate prime no

#1

by using prime suive till hoe much no. i should calculate prime so that i can give ans for the nth prime no.

#2

hi @guptanikhil898

as in constraints it is mention

Constraints

1<=n<=5000000

so make an array of 5000000

int*arr=new int [5000000]{};

i hope this help
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