/in/foo.c: In function 'main':
/in/foo.c:16:35: error: 'legnth' undeclared (first use in this function); did you mean 'length'?
   16 |                 int next_lenght = legnth;
      |                                   ^~~~~~
      |                                   length
/in/foo.c:16:35: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:26:25: error: 'if\U0000ff08begin' undeclared (first use in this function)
   26 |                         if（begin <= a[j][0] && end >= a[j][1]）
      |                         ^~~~~~~~~
/in/foo.c:26:63: error: expected ';' before '\U0000ff09'
   26 |                         if（begin <= a[j][0] && end >= a[j][1]）
      |                                                               ^~
      |                                                               ;