From 7c60dee83b436e8e8a667bf9f191beced8de4fc3 Mon Sep 17 00:00:00 2001 From: Jack Sangdahl Date: Mon, 10 Mar 2025 00:36:13 -0600 Subject: chore: move cpp and rust code to directory --- other/erect_fence.cpp | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 other/erect_fence.cpp (limited to 'other/erect_fence.cpp') diff --git a/other/erect_fence.cpp b/other/erect_fence.cpp new file mode 100644 index 0000000..9d26fb9 --- /dev/null +++ b/other/erect_fence.cpp @@ -0,0 +1,29 @@ +#include "leetcode.h" + +class Solution { +public: + using tree = vector; + vector outerTrees(vector &trees) { + auto cross = [](tree &a, tree &b, tree &c) -> int { + return (c[1] - a[1]) * (a[0] - b[0]) - (a[1] - b[1]) * (c[0] - a[0]); + }; + sort(trees.begin(), trees.end()); + deque dv; + for (tree t : trees) { + while (dv.size() >= 2 && + cross(dv[dv.size() - 1], dv[dv.size() - 2], t) < 0) + dv.pop_back(); + dv.push_back(t); + while (dv.size() >= 2 && cross(dv[0], dv[1], t) > 0) + dv.pop_front(); + dv.push_front(t); + } + set unique(dv.begin(), dv.end()); + return vector(unique.begin(), unique.end()); + } +}; + +int main() { + Solution obj; + vvd trees = {{1, 1}, {2, 2}, {2, 0}, {2, 4}, {3, 3}, {4, 2}}; +} -- cgit v1.2.3