Answer Posted / m3th0d

main() doesn't require any header file,
header files are not the part of C language they just
provides the means of accessing input/output and other
utilities.

int main()
{
int a=10;
return 0;
}
can be compiled without including any header file :)

if the area was hit by a virus and so the decrease in the population because of death was x/3 and the migration from other places increased a population by 2x then annually it had so many ppl. find our the population in the starting.

5254

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