Record Case Detail

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terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_M_construct null not valid

Your answer may be identical to the JOJ answer in the first several lines.

However, the main problem you meet now is Runtime Error. And the exit code of your program is -6, which should be 0.

Please double check your code to solve this problem and try again.

Initial state
____ ____ ____ ____ ____ ____ ____ ____ wa_w ____ ____ ____ ____ ____ ____ ____ ____ al_n 
____ ____ ____ ____ le_e ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ fl_e 
____ ____ ____ ____ ____ ____ le_w ____ ____ ____ rr_e ____ ____ ____ ____ ____ pa_s la_s 
____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ wa_s al_w ____ ____ ____ ____ ____ 
____ ____ ____ ____ ____ ____ rr_s ____ ____ ____ ____ ____ ____ ____ ____ ____ lr_w ____ 
____ ____ ____ ____ ____ fl_n al_s ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ 
____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ rr_n ____ 
____ ____ fl_s la_s ____ pa_s pa_e ____ ____ ____ rr_e ____ ____ ____ ____ ____ ____ wa_e 
____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ pa_n ____ ____ ____ ____ ____ 
al_n pa_e ____ ____ ____ wa_e ____ la_e ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ 
____ ____ le_e ____ ____ la_s ____ ____ ____ ____ ____ ____ ____ fl_e la_w ____ ____ ____ 
____ ____

Initial state
____ ____ ____ ____ ____ ____ ____ ____ wa_w ____ ____ ____ ____ ____ ____ ____ ____ al_n 
____ ____ ____ ____ le_e ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ fl_e 
____ ____ ____ ____ ____ ____ le_w ____ ____ ____ rr_e ____ ____ ____ ____ ____ pa_s la_s 
____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ wa_s al_w ____ ____ ____ ____ ____ 
____ ____ ____ ____ ____ ____ rr_s ____ ____ ____ ____ ____ ____ ____ ____ ____ lr_w ____ 
____ ____ ____ ____ ____ fl_n al_s ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ 
____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ rr_n ____ 
____ ____ fl_s la_s ____ pa_s pa_e ____ ____ ____ rr_e ____ ____ ____ ____ ____ ____ wa_e 
____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ pa_n ____ ____ ____ ____ ____ 
al_n pa_e ____ ____ ____ wa_e ____ la_e ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ 
____ ____ le_e ____ ____ la_s ____ ____ ____ ____ ____ ____ ____ fl_e la_w ____ ____ ____ 
____ ____

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JOJ Answer