Eroare de compilare: user.c: In function ‘read_and_solve’: user.c:33: error: ‘ok_right’ undeclared (first use in this function) user.c:33: error: (Each undeclared identifier is reported only once user.c:33: error: for each function it appears in.) user.c:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:13: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result