fread讀入掛

const int BUF=40000000;
char Buf[BUF],*buf=Buf;
const int OUT=20000000;
char Out[OUT],*ou=Out;int Outn[30],Outcnt;
inline void write(int x){if(!x)*ou++=48;else{for(Outcnt=0;x;x/=10)Outn[++Outcnt]=x%10+48;while(Outcnt)*ou++=Outn[Outcnt--];}
}
inline void writell(ll x){if(!x)*ou++=48;else{for(Outcnt=0;x;x/=10)Outn[++Outcnt]=x%10+48;while(Outcnt)*ou++=Outn[Outcnt--];}
}
inline void writechar(char x){*ou++=x;}
inline void writeln(){*ou++='\n';}
inline void read(int&a){for(a=0;*buf<48;buf++);while(*buf>47)a=a*10+*buf++-48;}//這句話放到代碼中
fread(Buf,1,BUF,stdin);//樣例
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int BUF=40000000;
char Buf[BUF],*buf=Buf;
const int OUT=20000000;
char Out[OUT],*ou=Out;int Outn[30],Outcnt;
inline void write(int x){if(!x)*ou++=48;else{for(Outcnt=0;x;x/=10)Outn[++Outcnt]=x%10+48;while(Outcnt)*ou++=Outn[Outcnt--];}
}
inline void writell(ll x){if(!x)*ou++=48;else{for(Outcnt=0;x;x/=10)Outn[++Outcnt]=x%10+48;while(Outcnt)*ou++=Outn[Outcnt--];}
}
inline void writechar(char x){*ou++=x;}
inline void writeln(){*ou++='\n';}
inline void read(int&a){for(a=0;*buf<48;buf++);while(*buf>47)a=a*10+*buf++-48;}int main(){fread(Buf,1,BUF,stdin);int a,b;read(a),read(b);write(a+b);writeln();fwrite(Out,1,ou-Out,stdout);
}

一般讀入掛

inline ll read()
{int x=0,f=1;char ch=getchar();while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}return x*f;
}

超神讀入掛：

namespace fastIO{#define BUF_SIZE 100000#define OUT_SIZE 100000#define ll long long//fread->readbool IOerror=0;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,1,BUF_SIZE,stdin);if (pend==p1){IOerror=1;return -1;}//{printf("IO error!\n");system("pause");for (;;);exit(0);}}return *p1++;}inline bool blank(char ch){return ch==' '||ch=='\n'||ch=='\r'||ch=='\t';}inline void read(int &x){bool sign=0; char ch=nc(); x=0;for (;blank(ch);ch=nc());if (IOerror)return;if (ch=='-')sign=1,ch=nc();for (;ch>='0'&&ch<='9';ch=nc())x=x*10+ch-'0';if (sign)x=-x;}inline void read(ll &x){bool sign=0; char ch=nc(); x=0;for (;blank(ch);ch=nc());if (IOerror)return;if (ch=='-')sign=1,ch=nc();for (;ch>='0'&&ch<='9';ch=nc())x=x*10+ch-'0';if (sign)x=-x;}inline void read(double &x){bool sign=0; char ch=nc(); x=0;for (;blank(ch);ch=nc());if (IOerror)return;if (ch=='-')sign=1,ch=nc();for (;ch>='0'&&ch<='9';ch=nc())x=x*10+ch-'0';if (ch=='.'){double tmp=1; ch=nc();for (;ch>='0'&&ch<='9';ch=nc())tmp/=10.0,x+=tmp*(ch-'0');}if (sign)x=-x;}inline void read(char *s){char ch=nc();for (;blank(ch);ch=nc());if (IOerror)return;for (;!blank(ch)&&!IOerror;ch=nc())*s++=ch;*s=0;}inline void read(char &c){for (c=nc();blank(c);c=nc());if (IOerror){c=-1;return;}}//getchar->readinline void read1(int &x){char ch;int bo=0;x=0;for (ch=getchar();ch<'0'||ch>'9';ch=getchar())if (ch=='-')bo=1;for (;ch>='0'&&ch<='9';x=x*10+ch-'0',ch=getchar());if (bo)x=-x;}inline void read1(ll &x){char ch;int bo=0;x=0;for (ch=getchar();ch<'0'||ch>'9';ch=getchar())if (ch=='-')bo=1;for (;ch>='0'&&ch<='9';x=x*10+ch-'0',ch=getchar());if (bo)x=-x;}inline void read1(double &x){char ch;int bo=0;x=0;for (ch=getchar();ch<'0'||ch>'9';ch=getchar())if (ch=='-')bo=1;for (;ch>='0'&&ch<='9';x=x*10+ch-'0',ch=getchar());if (ch=='.'){double tmp=1;for (ch=getchar();ch>='0'&&ch<='9';tmp/=10.0,x+=tmp*(ch-'0'),ch=getchar());}if (bo)x=-x;}inline void read1(char *s){char ch=getchar();for (;blank(ch);ch=getchar());for (;!blank(ch);ch=getchar())*s++=ch;*s=0;}inline void read1(char &c){for (c=getchar();blank(c);c=getchar());}//scanf->readinline void read2(int &x){scanf("%d",&x);}inline void read2(ll &x){#ifdef _WIN32scanf("%I64d",&x);#else#ifdef __linuxscanf("%lld",&x);#elseputs("error:can't recognize the system!");#endif#endif}inline void read2(double &x){scanf("%lf",&x);}inline void read2(char *s){scanf("%s",s);}inline void read2(char &c){scanf(" %c",&c);}inline void readln2(char *s){gets(s);}//fwrite->writestruct Ostream_fwrite{char *buf,*p1,*pend;Ostream_fwrite(){buf=new char[BUF_SIZE];p1=buf;pend=buf+BUF_SIZE;}void out(char ch){if (p1==pend){fwrite(buf,1,BUF_SIZE,stdout);p1=buf;}*p1++=ch;}void print(int x){static char s[15],*s1;s1=s;if (!x)*s1++='0';if (x<0)out('-'),x=-x;while(x)*s1++=x%10+'0',x/=10;while(s1--!=s)out(*s1);}void println(int x){static char s[15],*s1;s1=s;if (!x)*s1++='0';if (x<0)out('-'),x=-x;while(x)*s1++=x%10+'0',x/=10;while(s1--!=s)out(*s1); out('\n');}void print(ll x){static char s[25],*s1;s1=s;if (!x)*s1++='0';if (x<0)out('-'),x=-x;while(x)*s1++=x%10+'0',x/=10;while(s1--!=s)out(*s1);}void println(ll x){static char s[25],*s1;s1=s;if (!x)*s1++='0';if (x<0)out('-'),x=-x;while(x)*s1++=x%10+'0',x/=10;while(s1--!=s)out(*s1); out('\n');}void print(double x,int y){static ll mul[]={1,10,100,1000,10000,100000,1000000,10000000,100000000,1000000000,10000000000LL,100000000000LL,1000000000000LL,10000000000000LL,100000000000000LL,1000000000000000LL,10000000000000000LL,100000000000000000LL};if (x<-1e-12)out('-'),x=-x;x*=mul[y];ll x1=(ll)floor(x); if (x-floor(x)>=0.5)++x1;ll x2=x1/mul[y],x3=x1-x2*mul[y]; print(x2);if (y>0){out('.'); for (size_t i=1;i<y&&x3*mul[i]<mul[y];out('0'),++i); print(x3);}}void println(double x,int y){print(x,y);out('\n');}void print(char *s){while (*s)out(*s++);}void println(char *s){while (*s)out(*s++);out('\n');}void flush(){if (p1!=buf){fwrite(buf,1,p1-buf,stdout);p1=buf;}}~Ostream_fwrite(){flush();}}Ostream;inline void print(int x){Ostream.print(x);}inline void println(int x){Ostream.println(x);}inline void print(char x){Ostream.out(x);}inline void println(char x){Ostream.out(x);Ostream.out('\n');}inline void print(ll x){Ostream.print(x);}inline void println(ll x){Ostream.println(x);}inline void print(double x,int y){Ostream.print(x,y);}inline void println(double x,int y){Ostream.println(x,y);}inline void print(char *s){Ostream.print(s);}inline void println(char *s){Ostream.println(s);}inline void println(){Ostream.out('\n');}inline void flush(){Ostream.flush();}//puts->writechar Out[OUT_SIZE],*o=Out;inline void print1(int x){static char buf[15];char *p1=buf;if (!x)*p1++='0';if (x<0)*o++='-',x=-x;while(x)*p1++=x%10+'0',x/=10;while(p1--!=buf)*o++=*p1;}inline void println1(int x){print1(x);*o++='\n';}inline void print1(ll x){static char buf[25];char *p1=buf;if (!x)*p1++='0';if (x<0)*o++='-',x=-x;while(x)*p1++=x%10+'0',x/=10;while(p1--!=buf)*o++=*p1;}inline void println1(ll x){print1(x);*o++='\n';}inline void print1(char c){*o++=c;}inline void println1(char c){*o++=c;*o++='\n';}inline void print1(char *s){while (*s)*o++=*s++;}inline void println1(char *s){print1(s);*o++='\n';}inline void println1(){*o++='\n';}inline void flush1(){if (o!=Out){if (*(o-1)=='\n')*--o=0;puts(Out);}}struct puts_write{~puts_write(){flush1();}}_puts;inline void print2(int x){printf("%d",x);}inline void println2(int x){printf("%d\n",x);}inline void print2(char x){printf("%c",x);}inline void println2(char x){printf("%c\n",x);}inline void print2(ll x){#ifdef _WIN32printf("%I64d",x);#else#ifdef __linuxprintf("%lld",x);#elseputs("error:can't recognize the system!");#endif#endif}inline void println2(ll x){print2(x);printf("\n");}inline void println2(){printf("\n");}#undef ll#undef OUT_SIZE#undef BUF_SIZE
};
using namespace fastIO;

轉載于:https://www.cnblogs.com/qscqesze/p/5736748.html

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