fastIO模板

freadIO整理

 namespace fastIO{
     #define BUF_SIZE 100000
     bool IOerror=;
     inline char nc() {
         static char buf[BUF_SIZE],*p1=buf+BUF_SIZE,*pend=buf+BUF_SIZE;
         if(p1==pend){
             p1=buf;
             pend=buf+fread(buf,,BUF_SIZE,stdin);
             if(pend==p1){
                 IOerror=;
                 return -;
             }
         }
         return *p1++;
       }
       inline bool blank(char ch) {
           return ch==' '||ch=='\n'||ch=='\r'||ch=='\t';
       }
       inline void read(int &x) {
           char ch;
           while(blank(ch=nc()));
           if(IOerror)    return;
           for(x=ch-'';(ch=nc())>=''&&ch<='';x=(x<<)+(x<<)+ch-'');
       }
       #undef BUF_SIZE
   };
 using namespace fastIO;