Cleaned up geometry libraries

Geometry/points_lines_vectors.cpp

@@ -27,7 +27,7 @@ double angle(point a, point o, point b) {
 	return acos(dot(oa, ob) / sqrt(norm_sq(oa) * norm_sq(ob)));
 }
 
-// (q.x - p.x) * (r.y - p.y) - (r.x - p.x) * (q.y - p.y)
+// bool ccw(pl p, pl q, pl r) { return (q.f - p.f) * (r.s - p.s) - (r.f - p.f) * (q.s - p.s) > 0; }
 bool ccw(point p, point q, point r) { return cross(vec(p, q), vec(p, r)) > 0; }
 
 struct line {

Geometry/polygons.cpp

@@ -1,5 +1,5 @@
 struct point {
-	ll x, y; // long long to avoid overflow problems
+	ll x, y;
 	point() { x = y = 0; }
 	point(ll _x, ll _y) : x(_x), y(_y) {}
 	bool operator < (point p) const { return (x == p.x && y < p.y) || x < p.x; }