answer.code: In function ‘void Solver::solve()’:
answer.code:53:9: error: expected primary-expression before ‘}’ token
   53 |         }
      |         ^
answer.code: In function ‘void Solver::mian()’:
answer.code:56:50: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=]
   56 |                 fprintf(stderr, "floor memery : %d\n", (&_st - &_ed) >> 20);
      |                                                 ~^     ~~~~~~~~~~~~~~~~~~~
      |                                                  |                   |
      |                                                  int                 long int
      |                                                 %ld