c++快读快写

inline int read () {
	int s = 0, f = 1;
	char ch = getchar ();
	while (ch < '0' || ch > '9') {
		if (ch == '-')
			f = -1;
		ch = getchar ();
	}
	while (ch >= '0' && ch <= '9') {
		s = s * 10 + ch - '0';
		ch = getchar ();
	}
	return s * f;
}

inline void write (int x) {
    if (x < 0) {
    	putchar ('-');
		x = -x;
	}
    if (x > 9) 
		write (x / 10);
    putchar (x % 10 + '0');
}