Problem with the code

#1

https://ide.codingblocks.com/s/268331.What’s the problem with this code

#2

Take upperbound (ceil) for start.
also in seive do till <N (and not <=N)

#3

https://ide.codingblocks.com/s/269746. please check out this solution it’s working for the sample test cases

#4


Please take a look at your code! works fine

#5

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