看看是不是出了ub或者一些奇奇怪怪的问题
by _Remake_ @ 2022-05-06 10:45:12
@[_Remake_](/user/576702) 检测后发现是快读的问题？但是我这个快读用了很多次都没锅，这次怎么就锅了QuQ
```cpp
class fastIO{private:char ibuf[1000007],*p1=ibuf,*p2=ibuf,obuf[1000007],*p3=obuf,sta[50];bool file_end=false;char get(){return p1==p2&&(p2=(p1=ibuf)+fread(ibuf,1,1000007,stdin),p1==p2)?(file_end=true),EOF:*p1++;}void put(char x){p3-obuf<1000007?*p3++=x:(fwrite(obuf,p3-obuf,1,stdout),p3=obuf,*p3++=x);}public:explicit operator bool(){return!file_end;}size_t flush(){size_t f=fwrite(obuf,p3-obuf,1,stdout);p3=obuf;*p3=0;return f;}fastIO&operator>>(char&t){for(t=get();isspace(t);t=get());return*this;}fastIO&operator>>(char*t){for(char c=get();c!=10;c=get())*t=c,t++;*t=0;return*this;}fastIO&operator>>(std::string&t){t.clear();for(char c=get();!isspace(c);c=get())t.push_back(c);return*this;}template<typename any>typename std::enable_if<std::is_signed<any>::value,fastIO>::type&operator>>(any&t){t=0;bool y=0;char c=get();for(;!isdigit(c);c=get())if(c==45)y=true;for(;isdigit(c);c=get())t=t*10+(c-48);if(y==1)t=-t;return*this;}fastIO&operator>>(__int128_t&t){t=0;bool y=0;char c=get();for(;!isdigit(c);c=get())if(c==45)y=true;for(;isdigit(c);c=get())t=t*10+(c-48);if(y==1)t=-t;return*this;}template<typename any>typename std::enable_if<std::is_unsigned<any>::value,fastIO>::type&operator>>(any&t){t=0;char c=get();for(;!isdigit(c);c=get());for(;isdigit(c);c=get())t=t*10+(c-48);return*this;}fastIO&operator>>(__uint128_t&t){t=0;char c=get();for(;!isdigit(c);c=get());for(;isdigit(c);c=get())t=t*10+(c-48);return*this;}template<typename any1,typename any2>fastIO&operator>>(std::pair<any1,any2>&t){return*this>>t.first>>t.second;}fastIO&operator<<(const char t){put(t);return*this;}fastIO&operator<<(const char*t){for(;*t;t++)put(*t);return*this;}fastIO&operator<<(const std::string&t){for(const char it:t)put(it);return*this;}template<typename any>typename std::enable_if<std::is_signed<any>::value,fastIO>::type&operator<<(any t){if(!t){put(48);return*this;}int len=0;if(t<0)t=-t,put(45);while(t)sta[len++]=t%10+48,t/=10;while(len--)put(sta[len]);return*this;}fastIO&operator<<(__int128_t t){if(!t){put(48);return*this;}int len=0;if(t<0)t=-t,put(45);while(t)sta[len++]=t%10+48,t/=10;while(len--)put(sta[len]);return*this;}template<typename any>typename std::enable_if<std::is_unsigned<any>::value,fastIO>::type&operator<<(any t){if(!t){put(48);return*this;}int len=0;while(t)sta[len++]=t%10+48,t/=10;while(len--)put(sta[len]);return*this;}fastIO&operator<<(__uint128_t t){if(!t){put(48);return*this;}int len=0;while(t)sta[len++]=t%10+48,t/=10;while(len--)put(sta[len]);return*this;}template<typename any1,typename any2>fastIO&operator<<(const std::pair<any1,any2>&t){return*this<<t.first<<' '<<t.second;}~fastIO(){fwrite(obuf,p3-obuf,1,stdout);}}fio;
```
by 蒟酱 @ 2022-05-06 13:41:04
@[蒟酱](/user/310818) 可能是您的超级快读读字符串的时候有点问题qwq
by _Remake_ @ 2022-05-06 14:18:19
@[_Remake_](/user/576702) 改完了QaQ，再也不用 isspace 了，用 isgraph
```cpp
class fastIO{private:char ibuf[1000007],*p1=ibuf,*p2=ibuf,obuf[1000007],*p3=obuf,sta[50];bool file_end=false;char get(){return p1==p2&&(p2=(p1=ibuf)+fread(ibuf,1,1000007,stdin),p1==p2)?(file_end=true),EOF:*p1++;}void put(char x){p3-obuf<1000007?*p3++=x:(fwrite(obuf,p3-obuf,1,stdout),p3=obuf,*p3++=x);}public:explicit operator bool(){return!file_end;}size_t flush(){size_t f=fwrite(obuf,p3-obuf,1,stdout);p3=obuf;*p3=0;return f;}fastIO&operator>>(char&t){for(t=get();!isgraph(t);t=get());return*this;}fastIO&operator>>(char*t){char c;*this>>c;for(;isgraph(c);c=get())*t=c,t++;*t=0;return*this;}fastIO&operator>>(std::string&t){t.clear();char c;*this>>c;for(;isgraph(c);c=get())t+=c;return*this;}template<typename any>typename std::enable_if<std::is_signed<any>::value,fastIO>::type&operator>>(any&t){t=0;bool y=0;char c=get();for(;!isdigit(c);c=get())if(c==45)y=true;for(;isdigit(c);c=get())t=t*10+(c-48);if(y==1)t=-t;return*this;}fastIO&operator>>(__int128_t&t){t=0;bool y=0;char c=get();for(;!isdigit(c);c=get())if(c==45)y=true;for(;isdigit(c);c=get())t=t*10+(c-48);if(y==1)t=-t;return*this;}template<typename any>typename std::enable_if<std::is_unsigned<any>::value,fastIO>::type&operator>>(any&t){t=0;char c=get();for(;!isdigit(c);c=get());for(;isdigit(c);c=get())t=t*10+(c-48);return*this;}fastIO&operator>>(__uint128_t&t){t=0;char c=get();for(;!isdigit(c);c=get());for(;isdigit(c);c=get())t=t*10+(c-48);return*this;}template<typename any1,typename any2>fastIO&operator>>(std::pair<any1,any2>&t){return*this>>t.first>>t.second;}fastIO&operator<<(const char t){put(t);return*this;}fastIO&operator<<(const char*t){for(;*t;t++)put(*t);return*this;}fastIO&operator<<(const std::string&t){for(const char it:t)put(it);return*this;}template<typename any>typename std::enable_if<std::is_signed<any>::value,fastIO>::type&operator<<(any t){if(!t){put(48);return*this;}int len=0;if(t<0)t=-t,put(45);while(t)sta[len++]=t%10+48,t/=10;while(len--)put(sta[len]);return*this;}fastIO&operator<<(__int128_t t){if(!t){put(48);return*this;}int len=0;if(t<0)t=-t,put(45);while(t)sta[len++]=t%10+48,t/=10;while(len--)put(sta[len]);return*this;}template<typename any>typename std::enable_if<std::is_unsigned<any>::value,fastIO>::type&operator<<(any t){if(!t){put(48);return*this;}int len=0;while(t)sta[len++]=t%10+48,t/=10;while(len--)put(sta[len]);return*this;}fastIO&operator<<(__uint128_t t){if(!t){put(48);return*this;}int len=0;while(t)sta[len++]=t%10+48,t/=10;while(len--)put(sta[len]);return*this;}template<typename any1,typename any2>fastIO&operator<<(const std::pair<any1,any2>&t){return*this<<t.first<<' '<<t.second;}~fastIO(){fwrite(obuf,p3-obuf,1,stdout);}}fio;
```
by 蒟酱 @ 2022-05-06 14:29:05
@[蒟酱](/user/310818) 你这快读属于是压行界的标杆和泰斗了
by _Remake_ @ 2022-05-06 14:36:42