/in/foo.c: In function 'main':
/in/foo.c:7:11: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  if(-10^10<=a&&a<=10^10,-10^10<=b&&b<=10^10)
         ~~^~~
/in/foo.c:7:17: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  if(-10^10<=a&&a<=10^10,-10^10<=b&&b<=10^10)
                ~^~~~
/in/foo.c:7:31: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  if(-10^10<=a&&a<=10^10,-10^10<=b&&b<=10^10)
                             ~~^~~
/in/foo.c:7:37: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
  if(-10^10<=a&&a<=10^10,-10^10<=b&&b<=10^10)
                                    ~^~~~
/in/foo.c:7:24: warning: left-hand operand of comma expression has no effect [-Wunused-value]
  if(-10^10<=a&&a<=10^10,-10^10<=b&&b<=10^10)
                        ^