Fast I/O for C++

fastio.cpp

#include <cstdio>

#define abs(a) ((a < 0) ? -(a) : (a))

template <class T>
void print(T a)
{
	if(a == 0)
		putchar_unlocked('0');
	if(a < 0)
		putchar('-');

	a = abs(a);
	char b[10];
	int i = 0;
	for (; i < 10 && a; i++)
	{
		b[i] = a % 10;
		a /= 10;
	}
	for (i--; i >= 0; i--)
		putchar_unlocked(b[i] + '0');
}

template <class T>
void read(T & a)
{
	a = 0;
	bool u = false;
	char c = 0;
	while (c < '0' || c > '9')
	{
		c = getchar_unlocked();
		if(c == '-')
			u = true;
	}
	do
	{
		a *= 10;
		a += c - '0';
	} while ((c = getchar_unlocked()) >= '0' && c <= '9');
	if(u) 
		a = -a;
}