【模板】快速读入

 1 inline int read()
 2 {
 3 int w=0,s=1;
 4 char ch=getchar();
 5 while(ch<'0' || ch>'9')
 6 {
 7 if(ch=='-') s=-1;
 8 ch=getchar();
 9 }
10 while(ch>='0' && ch<='9')
11 {
12 w=w*10+ch-'0';
13 ch=getchar();
14 }
15 return s*w;
16 }