/in/foo.cc: In function 'int count(int)':
/in/foo.cc:17:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if (x[j][1]=x[i][1])
       ~~~~~~~^~~~~~~~
/in/foo.cc:21:7: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if (m=2)
      ~^~
/in/foo.cc:25:2: warning: control reaches end of non-void function [-Wreturn-type]
  } 
  ^