读优&&输优

很nb的技巧……
但奇怪的是只能对文件使用……

然而交到OJ上或者比赛的时候都没有关系→_→

我大概也只能弄弄这些花里胡哨的东西了→_→

原理不清楚，背个板子好了

//minamoto

#include<bits/stdc++.h>

#define R register

#define fp(i,a,b) for(R int i=(a),I=(b)+1;i<I;++i)

#define fd(i,a,b) for(R int i=(a),I=(b)-1;i>I;--i)

#define go(u) for(int i=head[u],v=e[i].v;i;i=e[i].nx,v=e[i].v)

template<class T>inline bool cmin(T&a,const T&b){return a>b?a=b,:;}

template<class T>inline bool cmax(T&a,const T&b){return a<b?a=b,:;}

using namespace std;

char buf[<<],*p1=buf,*p2=buf;

inline char getc(){return p1==p2&&(p2=(p1=buf)+fread(buf,,<<,stdin),p1==p2)?EOF:*p1++;}

int read(){

    R int res,f=;R char ch;

    while((ch=getc())>''||ch<'')(ch=='-')&&(f=-);

    for(res=ch-'';(ch=getc())>=''&&ch<='';res=res*+ch-'');

    return res*f;

}

int read(char *s){

    R int len=;R char ch;while(((ch=getc())>''||ch<''));

    for(s[++len]=ch;(ch=getc())>=''&&ch<='';s[++len]=ch);

    return s[len+]='\0',len;

}

double readdb()

{

    R double x=,y=0.1,f=;R char ch;

    while((ch=getc())>''||ch<'')(ch=='-')&&(f=-);

    for(x=ch-'';(ch=getc())>=''&&ch<='';x=x*+ch-'');

    for(ch=='.'&&(ch=getc());ch>=''&&ch<='';x+=(ch-'')*y,y*=0.1,ch=getc());

    return x*f;

}

char sr[<<],z[];int C=-,Z=;

inline void Ot(){fwrite(sr,,C+,stdout),C=-;}

void print(R int x){

    if(C><<)Ot();if(x<)sr[++C]='-',x=-x;

    while(z[++Z]=x%+,x/=);

    while(sr[++C]=z[Z],--Z);sr[++C]='\n';

}

const int P=;

inline void upd(R int &x,R int y){(x+=y)>=P?x-=P:;}

inline int add(R int x,R int y){return x+y>=P?x+y-P:x+y;}

inline int dec(R int x,R int y){return x-y<?x-y+P:x-y;}

inline int mul(R int x,R int y){return 1ll*x*y-1ll*x*y/P*P;}

int ksm(R int x,R int y){

    R int res=;

    for(;y;y>>=,x=mul(x,x))(y&)?res=mul(res,x):;

    return res;

}