快读快写

Fir 快读

1 inline int read()
2 {
3     int X=0,w=0; char ch=0;
4     while(!isdigit(ch)) {w|=ch=='-';ch=getchar();}
5     while(isdigit(ch)) X=(X<<3)+(X<<1)+(ch^48),ch=getchar();
6     return w?-X:X;
7 }

 

快写

1 inline void write(int x)
2 {
3      if(x<0) putchar('-'),x=-x;
4      if(x>9) write(x/10);
5      putchar(x%10+'0');
6 }

 

更快的 Sec 快读

#define getchar()(p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++)
char buf[1<<21],*p1=buf,*p2=buf;
template <typename T>
inline void read(T& X) {
    X=0;bool w=0; char ch=getchar();
    while(ch<'0'||ch>'9') w=ch=='-'?1:0,ch=getchar();
    while(ch>='0'&&ch<='9') X=(X<<3)+(X<<1)+(ch^48), ch=getchar();
    X=w?-X:r;
}

 

标签：ch,int,while,快读,inline,getchar
来源： https://www.cnblogs.com/yozakurachiyuki/p/15567682.html