/in/foo.cc: In function 'bool isLeapYear(int)':
/in/foo.cc:5:23: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    5 |     if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
      |         ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~