/in/foo.cc: In function 'int getArea()':
/in/foo.cc:10:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if (all[2].x >= all[0].x&&all[2].x < all[1].x
      ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:33:29: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    if (all[i].y<all[i - 1].y&&all[i].x>all[i-1].x
        ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~