/in/foo.cc: In function 'bool better()':
/in/foo.cc:29:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
  if (vis[maxd]!=ans[maxd])
     ^
/in/foo.cc:34:6: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
   if (vis[i]!=ans[i])
      ^