8m3edk-w4h74s:1:9: fatal error: 'iostream.h' file not found
#include<iostream.h>
        ^
1 error generated.

#include <iostream>

Also better use not iostream,  but rather STDIO.

Just because?

My opinion:
C++ streams and C printf/scanf are equal.
For GCC compiler, "std::ios::sync_with_stdio(false);" method call is required at main() very beginning.

Significant input speed-up can be reached by using "getchar()" and/or "read()" functions and manual string->int conversion. This way is tricky, dangerous, I haven't seen task requires it.

Edited by author 07.06.2017 14:49