answer.code: In function ‘int32_t main()’:
answer.code:46:13: error: ‘cell’ was not declared in this scope; did you mean ‘ceill’?
   46 |         for(cell = 0; cell < 4; cell++) {
      |             ^~~~
      |             ceill
answer.code:51:29: error: expected ‘;’ before ‘)’ token
   51 |                 for(mask & k) {
      |                             ^
      |                             ;
answer.code:55:13: error: expected primary-expression before ‘}’ token
   55 |             }
      |             ^
answer.code:54:32: error: expected ‘)’ before ‘}’ token
   54 |                 tmp[cell] ^= 1;
      |                                ^
      |                                )
   55 |             }
      |             ~                   
answer.code:51:20: note: to match this ‘(’
   51 |                 for(mask & k) {
      |                    ^
answer.code:55:13: error: expected primary-expression before ‘}’ token
   55 |             }
      |             ^