/in/foo.cc: In function 'int card(int, int)':
/in/foo.cc:7:9: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if(a==1&&b==0||a==2&&b==1||a==0&&b==2)
     ~~~~^~~~~~
/in/foo.cc:7:33: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if(a==1&&b==0||a==2&&b==1||a==0&&b==2)
                             ~~~~^~~~~~