读入挂

板子

const int SIZE = 100000;
// SIZE 为读入数据长度，单位为字节
inline char nc() {
    static char buf[SIZE], *p1 = buf, *p2 = buf;
    return p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, SIZE, stdin), p1 == p2)? EOF: *p1++;
}
inline int _read() {
    char ch = nc();
    int sum = 0;
    while(!(ch >= '0' && ch <= '9')) ch = nc();
    while(ch >= '0' && ch <= '9') sum = sum * 10 + ch - 48, ch = nc();
    return sum;
}