Geometry

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

Resources

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

Three points	224 / 246	1000
Line segment intersection	142 / 174	1100
Line intersection	98 / 111	1100
Quadrilateral classification	71 / 84	1100
Point location	81 / 92	1100
Triangle classification	78 / 80	1200
Polygon area	115 / 118	1200
Distance to polygon	63 / 71	1400
Convex hull	103 / 118	1500
Perpendicular pairs	48 / 56	1600
Maximum quadrilateral	43 / 85	1700
Catching butterflies	7 / 16	2200