Can you tell me where i went wrong

#1

there are 6 test in which 5 cases are corrent and test case 0 is wrong. please tell me the error in my code
My code link is :- https://ide.codingblocks.com/s/212167

#2

please kindly resolve this problem as soon as possible

#3

@Kapil1704 the 5000000th prime number is 7,368,787 so your sieve should be big enough to hold that number.

#4

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