/in/foo.cc: In function 'int main()':
/in/foo.cc:7:10: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
 if(y%4==0&&y%100!=0||y%400==0)
    ~~~~~~^~~~~~~~~~
/in/foo.cc:19:9: error: expected '}' at end of input
 return 0;
         ^