foo.cc: In function 'int main()':
foo.cc:11:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   11 |   if(oy%4==0 && oy%100!=0 || oy%400==0)
      |      ~~~~~~~~^~~~~~~~~~~~
foo.cc:37:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   37 |    if(i%4==0 && i%100!=0 || i%400==0)
      |       ~~~~~~~^~~~~~~~~~~
foo.cc:46:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   46 |   if(oy%4==0 && oy%100!=0 || oy%400==0)
      |      ~~~~~~~~^~~~~~~~~~~~
foo.cc:55:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   55 |   if(my%4==0 && my%100!=0 || my%400==0)
      |      ~~~~~~~~^~~~~~~~~~~~

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