/in/foo.cc: In function 'int main()':
/in/foo.cc:14:6: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  if(a<b<c)
     ~^~
/in/foo.cc:20:6: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  if(c<b<a)
     ~^~
/in/foo.cc:26:6: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  if(a<c<b)
     ~^~
/in/foo.cc:32:6: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  if(b<c<a)
     ~^~
/in/foo.cc:38:6: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  if(c<a<b)
     ~^~
/in/foo.cc:44:6: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  if(b<a<c)
     ~^~