You're whooshing. You don't want to use "long long" because that's not necessarily 64-bits. You want to use int64_t which guarantees it is 64-bits. And then,

You're whooshing. You don't want to use "long long" because that's not necessarily 64-bits. You want to use int64_t which guarantees it is 64-bits. And then, the correct format specifier for that is PRIi64, and not "%ld" or "%lld" which will break in different platforms.