read(getchar)
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   | inline int read()  { 	char c=getchar(); 	int x=0,bj=1; 	while(c<'0'||c>'9')  	{ 		if(c=='-')  		{ 			bj=-1; 		} 		c=getchar(); 	} 	while(c>='0'&&c<='9')  	{ 		x=x*10+(c^48); 		c=getchar(); 	} 	return x*bj; }
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 write(getchar)
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   | inline void write(int x) {     if(x<0) 	{ 		putchar('-'); 		x=-x; 	}      if(x>9)  	{ 		write(x/10); 	}     putchar(x%10+'0'); }
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