#pragma GCC optimize("Ofast") #pragma GCC target("avx2") #define rd_init() char*rp=({char*mmap();mmap(0l,1l<<25,1,2,0,0ll);}) #define rd_skip() while(*rp++>=48) #define rd() ({int _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;}) #define WTHI(v) {unsigned _z=v,_n=0;ulong _d=0;while(++_n,_d=_d<<8|0x30|_z%10,_z/=10);*(ulong*)wp=_d;wp+=_n;} #define WTLO(v) {unsigned _z=v,_n=8;ulong _d=0;while(_d=_d<<8|0x30|_z%10,_z/=10,--_n);*(ulong*)wp=_d;wp+=8;} #define wt(v) if(v>=100000000){WTHI(v/100000000);WTLO(v);}else{WTHI(v);} typedef unsigned long ulong; char wbuf[1<<25]; int main(){ rd_init(); char*wp=wbuf; for(int t=rd();t--;){ char*n=rp; rd_skip(); char*e=rp-1; unsigned m=rd(); unsigned m2=m*2; ulong a=0; while(n+8