模板大全

快读：

1 int read () {
2      int k=0,f=1;
3      char c=getchar();
4      while (c<'0'||c>'9') {if (c=='-') f=-1;c=getchar();}
5      while (c>='0'||c<='9') {k=k*10+c-'0';c=getchar();}
6      return f*k;
7  }