输入

in.cpp

template <class T>
static void read(T &rec)
{
 	rec=0;
    char c;
    while((c=getchar())<'0' || c>'9');
    while(c>='0' && c<='9')
    {
    	rec=(rec<<3)+(rec<<1)+(c-'0');
        c=getchar();
    }
}