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| vector<vector<int>> kClosest(vector<vector<int>>& points, int k) { | ||
| // (distance, point pair) | ||
| std::priority_queue<std::pair<int, vector<int>>> k_closest_points; | ||
| for (auto point : points) { |
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こちらのコメントをご参照ください。
5ky7/arai60#22 (comment)
| std::vector<std::vector<int>> kClosest(std::vector<std::vector<int>>& points, int k) { | ||
| // note: the arg (point) is edited, you may want to copy | ||
| // std::vector<std::vector<int>> points_copy = points; | ||
| std::sort(points.begin(), points.end(), isCloser); |
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関数 (のポインター) を渡すと、インライン化されにくくなるようです。代わりに関数オブジェクトを渡すことをお勧めいたします。ラムダ式は関数オブジェクトのため、インライン化されやすいようです。
https://timsong-cpp.github.io/cppwp/n3337/expr.prim.lambda#3
The type of the lambda-expression (which is also the type of the closure object) is a unique, unnamed non-union class type — called the closure type — whose properties are described below.
| // note: the arg (point) is edited, you may want to copy | ||
| // std::vector<std::vector<int>> points_copy = points; | ||
| std::sort(points.begin(), points.end(), [](const std::vector<int>& a, const std::vector<int>& b){ | ||
| return (a[0] * a[0] + a[1] * a[1]) < (b[0] * b[0] + b[1] * b[1]); |
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a[0] * a[0] + a[1] * a[1] が 2 回登場するため、関数化したほうがすっきりするかもしれません。
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973. K Closest Points to Origin
https://leetcode.com/problems/k-closest-points-to-origin/