/in/foo.cc: In function 'int main()':
/in/foo.cc:40:54: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (w == 0 && (x + y < ax + ay || x + y == ax + ay && x * a + y * b < ax * a + ay * b))
                                     ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:58:54: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (w == 0 && (x + y < ax + ay || x + y == ax + ay && x * a + y * b < ax * a + ay * b))
                                     ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:79:54: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (w == 0 && (x + y < ax + ay || x + y == ax + ay && x * a + y * b < ax * a + ay * b))
                                     ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~