haust_dingbang @ 2021-03-15 20:15:13
无语了，我都已经分治了，用了全局变量了，结果还给我超时，然后才看到题解中说要用快读，我。。。换了好几种方式，先是std::sort,然后自己写个优先队列，然后分治（快速排序类似），我都想用基数排序了，嘤嘤嘤
by _caiji_ @ 2021-03-15 20:17:16
std::cin 读 5e6，不卡你卡谁？
by BotDand @ 2021-03-15 20:18:50
快读是个好东西
by PragmaGCC @ 2021-03-15 20:21:10
ios::sync_with_stdio(false);
by 天南星魔芋 @ 2021-03-15 20:23:31
不应该默认使用scanf吗
by BlachSnake @ 2021-03-15 20:26:45
namespace io{
int Read(){
char c=getchar();
int x=0,d=1;
while(!isdigit(c)){
if(c=='-')d=-1;
c=getchar();
}
while(isdigit(c))
x=x*10-48+c,c=getchar();
return x*d;
}
void pr(int x){
if(!x)return;
pr(x/10);
putchar(x%10+48);
}
void Print(int x){
if(x){
if(x<0)x=-x,putchar('-');
pr(x);
}
else putchar('0');
putchar('\n');
}
}快读，请
by 日居月诸 @ 2021-03-15 20:29:11
请加上优化。
ios::sync_with_stdio(0);
cin.tie(0);by Ryo_Yamada @ 2021-03-15 20:30:01
fread 不是更香吗
by konjacq @ 2021-03-15 20:31:12
> `std::cin` 读 5e6，不卡你卡谁？
这年头了不会还有人手里没个`fread` / `fwrite` 的 IO 优化板子吧
申必洛谷排版检测在干什么 我暂且蒙在鼓里建议你谷关掉排版检测 不然就解释为什么上面那一段未正确标记代码
by 王熙文 @ 2021-03-15 20:31:12
struct FastIO {
static const int S=1e7;int wpos;char wbuf[S];
FastIO():wpos(0){}
inline int readchar(){static char buf[S];static int len=0,pos=0;if(pos==len){pos=0,len=fread(buf,1,S,stdin);}if(pos==len){exit(0);}return buf[pos++];}
inline void writechar(int x){if(wpos==S){fwrite(wbuf,1,S,stdout),wpos=0;}wbuf[wpos++]=x;}
#ifndef ONLINE_JUDGE
#define readchar getchar
#define writechar putchar
#endif
inline int readint(){int s=1,c=readchar(),x=0;while(c<=32){c=readchar();}if(c=='-'){s=-1,c=readchar();}for(;('0'<=c && c<='9');c=readchar()){x=x*10+c-'0';}return x*s;}
inline int readuint(){int c=readchar(),x=0;while(c<=32){c=readchar();}for(;('0'<=c && c<='9');c=readchar()){x=x*10+c-'0';}return x;}
inline void writeint(int x){if(x<0){writechar('-'),x=-x;}char s[24];int n=0;while(x || !n){s[n++]='0'+x%10,x/=10;}while(n--){writechar(s[n]);}}
inline long long readlonglong(){int c=readchar();long long x=0,s=1;while(c<=32){c=readchar();}if(c=='-'){s=-1,c=readchar();}for(;('0'<=c && c<='9');c=readchar()){x=x*10+c-'0';}return x*s;}
inline void writelonglong(long long x){if(x<0){writechar('-'),x=-x;}char s[25];int n=0;while(x || !n){s[n++]='0'+x%10,x/=10;}while(n--){writechar(s[n]);}}
inline void readstring(char *s){int c=readchar();while(c<=32){c=readchar();}for(;c>32;c=readchar()){*s++=c;}*s=0;}
inline void writestring(const char *s){while(*s){writechar(*s++);}}
inline int readdouble(){int zheng=0,fuhao=1;bool xiaoshudian=0;double xiao=0,chushu=10;char c;while((c=readchar())<'0' || c>'9'){if(c=='-'){fuhao=-1;}}while(c>='0' && c<='9'){zheng=zheng*10+c-'0';c=readchar();}if(c!='.'){return fuhao*zheng;}while((c=readchar())>='0' && c<='9'){xiao+=(c-'0')/chushu;chushu*=10;}return fuhao*(zheng+xiao);}
~FastIO(){if(wpos){fwrite(wbuf,1,wpos,stdout),wpos=0;}}
}io;
#define readc io.readchar
#define writec io.writechar
#define read io.readint
#define readu io.readuint
#define write io.writeint
#define readl io.readlonglong
#define writel io.writelonglong
#define reads io.readstring
#define writes io.writestring
#define readd io.readdoubleby _caiji_ @ 2021-03-15 20:31:57
#include <cstdio>
namespace FAST_IO{
//#define DEBUG
class IO_chars{
private:
static const int _MAX_IO_SIZE=1<<20;
char _I_buf[_MAX_IO_SIZE],*_I_p1,*_I_p2;
char _O_buf[_MAX_IO_SIZE],*_O_p1,*_O_p2;
public:
#ifndef DEBUG
IO_chars():_I_p1(_I_buf),_I_p2(_I_buf),_O_p1(_O_buf),_O_p2(_O_buf+_MAX_IO_SIZE){}
~IO_chars(){std::fwrite(_O_buf,1,_O_p1-_O_buf,stdout);}
#endif
char getchar(){
#ifdef DEBUG
return std::getchar();
#endif
if(_I_p1==_I_p2){
_I_p1=_I_buf;
_I_p2=_I_p1+std::fread(_I_buf,1,_MAX_IO_SIZE,stdin);
}
return _I_p1==_I_p2?EOF:*_I_p1++;
}
void putchar(const char &_O_ch){
#ifdef DEBUG
std::putchar(_O_ch);
return ;
#endif
if(_O_p1==_O_p2){
std::fwrite(_O_buf,1,_MAX_IO_SIZE,stdout);
_O_p1=_O_buf;
}
*_O_p1++=_O_ch;
}
} IOER;
class IO{
private:
static const int _MAX_LEN=20,_ZERO=(int)'0';
int stack[_MAX_LEN];
public:
bool isdigit(const char &ch){return '0'<=ch&&ch<='9';}
bool isblank(const char &ch){return ch==' '||ch==EOF||ch=='\n'||ch=='\r'||ch=='\t';}
template<typename T>
inline void read(T &x){
#ifdef DEBUG
std::scanf("%d",&x);
return ;
#endif
x=0;int f=0;char ch=IOER.getchar();
for(;!isdigit(ch);f|=(ch=='-'),ch=IOER.getchar())
if(ch==EOF) return ;
for(; isdigit(ch);ch=IOER.getchar())
x=(x<<3)+(x<<1)+(ch^_ZERO);
if(f) x=(~x+1);
}
template<typename T>
inline void write(const T &x){
#ifdef DEBUG
std::printf("%d",x);
return ;
#endif
int num=x,top=0;
if(num<0) num=(~num+1),IOER.putchar('-');
do stack[top++]=num%10,num/=10; while(num);
while(top) IOER.putchar(stack[--top]+_ZERO);
}
inline void readstr(char *a){
#ifdef DEBUG
std::scanf("%s",a);
return ;
#endif
int i=0;char ch=IOER.getchar();
for(; isblank(ch);ch=IOER.getchar())
if(ch==EOF) return ;
for(;!isblank(ch);ch=IOER.getchar())
a[i++]=ch;
a[i]='\0';
}
inline void gets(char *a){
#ifdef DEBUG
std::scanf("%[^\n\r]c",a);
//不知道这种方式读入的字符串有没有\0，没有那就换成std::gets吧
return ;
#endif
int i=0;char ch=IOER.getchar();
for(; (ch==EOF||ch=='\n'||ch=='\r');ch=IOER.getchar())
if(ch==EOF) return ;
for(;!(ch==EOF||ch=='\n'||ch=='\r');ch=IOER.getchar())
a[i++]=ch;
a[i]='\0';
}
inline void puts(const char *a){
#ifdef DEBUG
std::puts(a);
return ;
#endif
for(int i=0;a[i]!='\0';i++)
IOER.putchar(a[i]);
IOER.putchar('\n');
}
} io;
//#undef DEBUG
}
using FAST_IO::io;
int x;
char a[10010];
int main(){
io.read(x);
io.write(x);
io.puts("");
io.gets(a);
io.puts(a);
return 0;
}