nodchip https://blog.hatena.ne.jp/nodchip/ nodchipの日記 https://nodchip.hatenadiary.org/ 幾何 複素数ライブラリを使うと楽 角度でソートして尺取メソッド int main() { double r; for (int X, Y; cin >> X >> Y >> r && r >= 0.0; ) { int N; cin >> N; vector<double> angles; for (int n = 0; n < N; ++n) { int x, y; cin >> x >> y; x -= X; y -= Y; if (sqrt((double)x * x + y * y) < r + EPS) { angles.push_back(atan2((double)y, (dou… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnodchip.hatenadiary.org%2Fentry%2F20100524%2F1274699247" title="PKU 1106 Transmitters - nodchipの日記" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2010-05-24 20:07:27 rich https://nodchip.hatenadiary.org/entry/20100524/1274699247 1.0 100%