結果
問題 | No.622 点と三角柱の内外判定 |
ユーザー |
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提出日時 | 2018-01-04 13:50:00 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 3 ms / 1,500 ms |
コード長 | 3,086 bytes |
コンパイル時間 | 635 ms |
コンパイル使用メモリ | 85,440 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-12-23 03:37:02 |
合計ジャッジ時間 | 1,811 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 32 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:116:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 116 | scanf("%lf%lf%lf", &ps[i].x, &ps[i].y, &ps[i].z); | ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ソースコード
/* -*- coding: utf-8 -*-** 622.cc: No.622 点と三角柱の内外判定 - yukicoder*/#include<cstdio>#include<cstdlib>#include<cstring>#include<cmath>#include<iostream>#include<string>#include<vector>#include<map>#include<set>#include<stack>#include<list>#include<queue>#include<deque>#include<algorithm>#include<numeric>#include<utility>#include<complex>#include<functional>using namespace std;/* constant *//* typedef */template <typename T>struct Pt3d {T x, y, z;Pt3d() {}Pt3d(T _x, T _y, T _z) : x(_x), y(_y), z(_z) {}Pt3d(const Pt3d& pt) : x(pt.x), y(pt.y), z(pt.z) {}bool operator==(const Pt3d pt) const {return x == pt.x && y == pt.y && z == pt.z;}Pt3d<T> operator+(const Pt3d pt) const {return Pt3d<T>(x + pt.x, y + pt.y, z + pt.z);}Pt3d<T> operator-() const {return Pt3d<T>(-x, -y, -z);}Pt3d<T> operator-(const Pt3d pt) const {return Pt3d<T>(x - pt.x, y - pt.y, z - pt.z);}Pt3d<T> operator*(T t) const {return Pt3d<T>(x * t, y * t, z * t);}Pt3d<T> operator/(T t) const {return Pt3d<T>(x / t, y / t, z / t);}T dot(Pt3d v) const { return x * v.x + y * v.y + z * v.z; }Pt3d<T> cross(Pt3d v) const {return Pt3d<T>(y * v.z - z * v.y, z * v.x - x * v.z, x * v.y - y * v.x);}Pt3d<T> mid(const Pt3d pt) {return Pt3d<T>((x + pt.x) / 2, (y + pt.y) / 2, (z + pt.z) / 2);}T d2() { return x * x + y * y + z * z; }double d() { return sqrt(d2()); }Pt3d<T> rotx(double th) {double c = cos(th), s = sin(th);return Pt3d<T>(x, c * y - s * z, s * y + c * z);}Pt3d<T> roty(double th) {double c = cos(th), s = sin(th);return Pt3d<T>(s * z + c * x, y, c * z - s * x);}Pt3d<T> rotz(double th) {double c = cos(th), s = sin(th);return Pt3d<T>(c * x - s * y, s * x + c * y, z);}Pt3d<T> rotx90() { return Pt3d<T>(x, -z, y); }Pt3d<T> roty90() { return Pt3d<T>(z, y, -x); }Pt3d<T> rotz90() { return Pt3d<T>(-y, x, z); }bool operator<(const Pt3d& pt) const {return (x < pt.x || (x == pt.x && (y < pt.y || (y == pt.y && z < pt.z))));}void print(string format) {printf(("(" + format + ", " + format + ", " + format + ")\n").c_str(),x, y, z);}void print() { print("%.6lf"); }};typedef Pt3d<double> pt;/* subroutines *//* global variables */pt ps[4], nvs[3];/* subroutines *//* main *//*p = t*nv+q(p-p0)*nv=(t*nv+q-p0)*nv=0 -> t*(nv*nv)=(p0-q)*nv -> t = (p0-q)*nv/(nv*nv)*/int main() {for (int i = 0; i < 4; i++)scanf("%lf%lf%lf", &ps[i].x, &ps[i].y, &ps[i].z);pt &q = ps[3];pt nv((ps[1] - ps[0]).cross(ps[2] - ps[0]));double t = (ps[0] - q).dot(nv) / nv.d2();pt p(nv * t + q);//p.print();for (int i = 0; i < 3; i++) {pt v0(ps[(i + 1) % 3] - ps[i]), v1(p - ps[i]);nvs[i] = v0.cross(v1);//nvs[i].print();}for (int i = 0; i < 3; i++) {double d = nvs[i].dot(nvs[(i + 1) % 3]);//printf("%lf\n", d);if (d <= 0.0) {puts("NO");return 0;}}puts("YES");return 0;}