foo.cc: In function 'int main()':
foo.cc:19:28: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   19 |   if((y1%400==0)||(y1%4==0)&&(y1%100!=0)){
      |                   ~~~~~~~~~^~~~~~~~~~~~~
foo.cc:32:27: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   32 |    if((i%400==0)||(i%4==0)&&(i%100!=0)){
      |                   ~~~~~~~~^~~~~~~~~~~~
foo.cc:39:28: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   39 |   if((y1%400==0)||(y1%4==0)&&(y1%100!=0)){
      |                   ~~~~~~~~~^~~~~~~~~~~~~
foo.cc:48:28: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   48 |   if((y2%400==0)||(y2%4==0)&&(y2%100!=0)){
      |                   ~~~~~~~~~^~~~~~~~~~~~~
foo.cc:57:28: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   57 |   if((y2%400==0)||(y2%4==0)&&(y2%100!=0)){
      |                   ~~~~~~~~~^~~~~~~~~~~~~

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