/in/foo.cc: In function 'int runnian(int)':
/in/foo.cc:6:28: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if(i%4==0&&i%100!=0||i&400==0)
                         ~~~^~~
/in/foo.cc:6:11: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if(i%4==0&&i%100!=0||i&400==0)
     ~~~~~~^~~~~~~~~~
/in/foo.cc:5:6: warning: unused variable 'count' [-Wunused-variable]
  int count;
      ^~~~~