foo.cc: In function 'int main()':
foo.cc:13:30: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   13 |                 if(year%4==0 && year%100!=0||year%400==0)
      |                    ~~~~~~~~~~^~~~~~~~~~~~~~
foo.cc:19:18: error: expected '}' at end of input
   19 |         return 0;
      |                  ^
foo.cc:4:1: note: to match this '{'
    4 | {
      | ^

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