/in/foo.cc: In function 'void pd1()':
/in/foo.cc:14:11: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if(n%4==0&&n%100!=0||n%400==0&&n%3200!=0)
     ~~~~~~^~~~~~~~~~
/in/foo.cc:14:4: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
  if(n%4==0&&n%100!=0||n%400==0&&n%3200!=0)
    ^