/in/foo.cc: In function 'int Run(int)':
/in/foo.cc:20:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  return year%4==0&&year%100!=0||year%400==0;
         ~~~~~~~~~^~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:14:8: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<cnt<<endl;
        ^~~