foo.cc: In function 'int main()':
foo.cc:23:13: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   23 |    if(i%4==0&&i%100!=0||i%400==0) c+=366;
      |       ~~~~~~^~~~~~~~~~
foo.cc:26:13: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   26 |   if(sy%4==0&&sy%100!=0||sy%406==0) m[2]=29;
      |      ~~~~~~~^~~~~~~~~~~
foo.cc:29:13: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   29 |   if(ey%4==0&&ey%100!=0||ey%400==0) m[2]=29;
      |      ~~~~~~~^~~~~~~~~~~

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