#pragma GCC optimize("Ofast") #pragma GCC target("avx2") char*mmap(); char wbuf[1<<25]; #define rd(v) long v=0;{int _c;while(_c=*rp++-48,_c>=0)v=v*10+_c;} #define wt(v) {long _z=v;do*--wp=_z%10+48;while(_z/=10);} #define rep(v,e) for(long v=0;v