/in/foo.cc: In function 'bool leap(int)':
/in/foo.cc:22:38: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  return ( y % 400 == 0 or y % 4 == 0 and y % 100 != 0 );
                           ~~~~~~~~~~~^~~~~~~~~~~~~~~~
/in/foo.cc: In function 'bool beyond(const int*)':
/in/foo.cc:45:22: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    or ymd[0] == 2001 and ymd[1] >  11
       ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
/in/foo.cc:46:39: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    or ymd[0] == 2001 and ymd[1] == 11 and ymd[2] > 4);
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~