dunkelheit reference

algorithm
array
ascii
bigint
bitop
container
- deque
- pairingheap
- radixheap
- sortedtree
- stack
- stackpayload
datastructure
- convexhull
- fastset
- segtree
- segtreenaive
- unionfind
dungeon
fastdiv
foundation
functional
geo
- circle
- polygon
- primitive
graph
- ariticulation
- bipatitematching
- bridge
- dfstree
- dijkstra
- directedmst
- hldecomp
- maxflow
- mincostflow
- namori
- primitive
- scc
int128
ldc
- inline
matrix
modint
modpoly
numeric
- convolution
- prime
- primitive
scanner
stopwatch
string
tree
twosat

dkh.geo.primitive

sgn

Declaration

int sgn(R)(R a);

-1: negative 0: almost 0 1: positive