/in/foo.cc: In function 'int main()':
/in/foo.cc:13:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   13 |         if(y%4==0&&y%100!=0||y%400==0)
      |            ~~~~~~^~~~~~~~~~
/in/foo.cc:24:12: error: expected primary-expression before ')' token
   24 |         if()
      |            ^