//C++读入黑科技
inline long long getint()
{long long _x=0;
char _ch;
for(_ch=getchar();_ch>'9'||_ch<'0';_ch=getchar());
for(;_ch<='9'&&_ch>='0';_ch=getchar())
_x=_x*10+_ch-48;
return _x;
}
C++读入“黑科技”模板
long long _x=0;
char _ch;
for(_ch=getchar();_ch>'9'||_ch<'0';_ch=getchar());
for(;_ch<='9'&&_ch>='0';_ch=getchar())
_x=_x*10+_ch-48;
return _x;
}