foo.cc: In function 'int main()':
foo.cc:51:17: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   51 |    if((yea1%4==0&&yea1%100!=0||yea1%400==0)&&day1>=30)
      |        ~~~~~~~~~^~~~~~~~~~~~~
foo.cc:57:30: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   57 |    if((yea1%4!=0||yea1%100==0&&yea1%400!=0)&&day1>=29)
      |                   ~~~~~~~~~~~^~~~~~~~~~~~~
foo.cc:90:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   90 |   if(day1>=30&&(yea1%4==0&&yea1%100!=0||yea1%400==0))
      |                 ~~~~~~~~~^~~~~~~~~~~~~
foo.cc:97:40: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   97 |    if(day1>=29&&(yea1%4!=0||yea1%100==0&&yea1%400!=0))
      |                             ~~~~~~~~~~~^~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务