关于被嗯偶爱劈

#define MAX 20
#define in FIO
#define out FIO
#define fi first
#define se second
#define eout cerr
#define il inline 
#define int long long
#define pii pair<int,int>
#define ull unsigned long long
#define TTT template<typename T> 
#define all(x) x.begin(),x.end()
#define _CRT_SECURE_NO_WARNINGS 1
#define ds(x) (x=='\r'||x=='\n'||x==' ')
#define YN(ans) out<<((ans)?"YES\n":"NO\n")
#define yn(ans) out<<((ans)?"yes\n":"no\n")
#define popcti(val) ((int)__builtin_popcount(val))
#define popct(val) ((int)__builtin_popcountll(val))
#define endl cerr<<"------------------I Love the Olympiad in Informatics------------------\n";
using namespace std;
#ifdef __linux__
#define gc getchar_unlocked
#define pc putchar_unlocked
#else
#define gc getchar
#define pc putchar
#define __int128 __int128_t
#endif
namespace fastIO {
	TTT il void read(T&a){a=0;char ch=gc();bool ok=0;for(;ch<'0'||ch>'9';)ok^=(ch=='-'),ch=gc();for(;ch>='0'&&ch<='9';)a=(a<<1)+(a<<3)+(ch^48),ch=gc();if(ok)a=-a;}
    il void read(char&ch){ch=gc();for(;ds(ch);)ch=gc();}
    il void read(string&s){s="";char ch=gc();for(;ds(ch);)ch=gc();for(;!(ds(ch)||ch==EOF);)s.push_back(ch),ch=gc();}
	TTT il void write(T a){if(a==0){pc('0');return;}static char ch[MAX];int till=0;if(a<0){pc('-');for(;a;)ch[till++]=-(a%10),a/=10;}else for(;a;)ch[till++]=a%10,a/=10;for(;till;)pc(ch[--till]^48);}
	il void write(const char ch){pc(ch);}
    il void write(const string s){for(int i=0;i<s.size();i++)pc(s[i]);}
    il void write(const char*a){while(*a)pc(*a++);}
    struct FIOstream{TTT il FIOstream operator>>(T&x){read(x);return{};}TTT il FIOstream operator<<(const T&x){write(x);return{};}}FIO;
}using fastIO::FIO;
#undef ds