__int128输入输出模板

__int128 read(){
    __int128 x=0,f=1;
    char ch=getchar();
    while(!isdigit(ch)&&ch!='-')ch=getchar();
    if(ch=='-')f=-1,ch=getchar();
    while(isdigit(ch))x=x*10+ch-'0',ch=getchar();
    return f*x;
}
void print(__int128 x){
    if(x<0)putchar('-'),x=-x;
    if(x>9)print(x/10);//注意这里是x>9不是x>10 
    putchar(x%10+'0');
}