diff options
Diffstat (limited to 'content')
| -rw-r--r-- | content/datastructures/dynamicConvexHull.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/content/datastructures/dynamicConvexHull.cpp b/content/datastructures/dynamicConvexHull.cpp index 36ef6f5..3e4020e 100644 --- a/content/datastructures/dynamicConvexHull.cpp +++ b/content/datastructures/dynamicConvexHull.cpp @@ -1,16 +1,16 @@ struct Line { mutable ll m, c, p; - bool operator<(const Line& o) const { return m < o.m; } + bool operator<(const Line& o) const { return m > o.m; } bool operator<(ll x) const { return p < x; } }; -struct HullDynamic : multiset<Line, less<>> { // max über Geraden +struct HullDynamic : multiset<Line, less<>> { // min über Geraden // (for doubles, use INF = 1/.0, div(a,c) = a/c) ll div(ll a, ll c) { return a / c - ((a ^ c) < 0 && a % c); } bool isect(iterator x, iterator y) { if (y == end()) { x->p = INF; return false; } - if (x->m == y->m) x->p = x->c > y->c ? INF : -INF; + if (x->m == y->m) x->p = x->c < y->c ? INF : -INF; else x->p = div(y->c - x->c, x->m - y->m); return x->p >= y->p; } |