Geometry

**Frequency: 2/10** Often appear in ICPC.

Resources

- [CP Algorithms: Basic Geometry](https://cp-algorithms.com/geometry/basic-geometry.html)

Three points	228 / 250	1000
Line segment intersection	147 / 179	1100
Line intersection	101 / 114	1100
Quadrilateral classification	73 / 86	1100
Point location	84 / 95	1100
Triangle classification	81 / 83	1200
Polygon area	120 / 123	1200
Distance to polygon	67 / 75	1400
Convex hull	107 / 122	1500
Perpendicular pairs	52 / 60	1600
Maximum quadrilateral	45 / 87	1700
Catching butterflies	7 / 16	2200