数据读入加速

来源：互联网发布：股票数据接口api 编辑：程序博客网时间：2024/05/29 04:57

//适用于正整数

template <class T>inline void scan_d(T &ret) {char c; ret=0;while((c=getchar())<'0'||c>'9');while(c>='0'&&c<='9') ret=ret*10+(c-'0'),c=getchar();}

//适用于正负整数

template <class T>inline bool scan_d(T &ret) {   char c; int sgn;   if(c=getchar(),c==EOF) return 0; //EOF   while(c!='-'&&(c<'0'||c>'9')) c=getchar();   sgn=(c=='-')?-1:1;   ret=(c=='-')?0:(c-'0');   while(c=getchar(),c>='0'&&c<='9') ret=ret*10+(c-'0');   ret*=sgn;   return 1;}

//适用于正负数,(int,long long,float,double)

template <class T>bool scan_d(T &ret){char c; int sgn; T bit=0.1;if(c=getchar(),c==EOF) return 0;while(c!='-'&&c!='.'&&(c<'0'||c>'9')) c=getchar();sgn=(c=='-')?-1:1;ret=(c=='-')?0:(c-'0');while(c=getchar(),c>='0'&&c<='9') ret=ret*10+(c-'0');if(c==' '||c=='\n'){ ret*=sgn; return 1; }while(c=getchar(),c>='0'&&c<='9') ret+=(c-'0')*bit,bit/=10;ret*=sgn;return 1;}

//输出（不常用）

inline void out(int x) {   if(x>9) out(x/10);   putchar(x%10+'0');}