输入外挂

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inline int IN(){
	char ch=getchar(); int f=1,x=0;
	while((ch<'0'||ch>'9')&&(ch!='-')) ch=getchar();
	if(ch=='-') f=-1,ch=getchar();
	while(ch>='0'&&ch<='9') x=(x<<1)+(x<<3)+ch-'0',ch=getchar();
	return x*f;
}

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转载自blog.csdn.net/Sirius_han/article/details/81700099