Submission #5018183
Source Code Expand
#include <iostream> #include <cstdio> #include <cstdlib> #include <cmath> #include <algorithm> #include <string> #include <vector> #include <list> #include <set> #include <stack> #include <queue> #define llong long long #define INF (__INT32_MAX__ / 2) #define EPS (1e-10) using namespace std; bool feq(double a, double b) { return abs(a - b) < EPS; } bool fgr(double a, double b) { return a - b >= EPS; } bool fls(double a, double b) { return b - a >= EPS; } bool fgeq(double a, double b) { return b - a < EPS; } bool fleq(double a, double b) { return a - b < EPS; } class Vector { public: class CcwOption { public: static const int COUNTER_CLOCKWISE = 1; static const int CLOCKWISE = -1; static const int ONLINE_BACK = 2; static const int ONLINE_FRONT = -2; static const int ON_SEGMENT = 0; }; double x, y; Vector() {} Vector(double x, double y) { this->x = x; this->y = y; } Vector operator + (Vector p) { return Vector(x + p.x, y + p.y); } Vector operator - (Vector p) { return Vector(x - p.x, y - p.y); } Vector operator * (double k) { return Vector(x * k, y * k); } Vector operator / (double k) { return Vector(x / k, y / k); } bool operator == (const Vector p) { return feq(x, p.x) && feq(y, p.y); } /* bool operator < (const Vector p) { return !feq(x, p.x) ? fls(x, p.x) : fls(y, p.y); } bool operator > (const Vector p) { return !feq(x, p.x) ? fgr(x, p.x) : fgr(y, p.y); } */ bool operator < (const Vector p) { return !feq(y, p.y) ? fls(y, p.y) : fls(x, p.x); } bool operator > (const Vector p) { return !feq(y, p.y) ? fgr(y, p.y) : fgr(x, p.x); } double norm() { return x * x + y * y; } double abs() { return sqrt(norm()); } double arg() { return atan2(y, x); } Vector project(Vector v) { return *this * (dot(*this, v) / norm()); } // ベクトルvの*thisへの射影 Vector normal() { return (*this) / abs(); } Vector rot(double theta) { return polar(abs(), theta + arg()); } static double dot(Vector a, Vector b) { return a.x * b.x + a.y * b.y; } static double cross(Vector a, Vector b) { return a.x * b.y - a.y * b.x; } static bool isOrthogonal(Vector a, Vector b) { return feq(dot(a, b), 0); } static bool isParallel(Vector a, Vector b) { return feq(cross(a, b), 0); } static double distance(Vector a, Vector b) { return (a - b).abs(); } static int ccw(Vector p0, Vector p1, Vector p2) { Vector a = p1 - p0; Vector b = p2 - p0; if(fgr(Vector::cross(a, b), 0)) return CcwOption::COUNTER_CLOCKWISE; else if(fls(Vector::cross(a, b), 0)) return CcwOption::CLOCKWISE; else if(fls(Vector::dot(a, b), 0)) return CcwOption::ONLINE_BACK; else if(fls(a.norm(), b.norm())) return CcwOption::ONLINE_FRONT; else return CcwOption::ON_SEGMENT; } static Vector polar(double r, double a) { return Vector(r * cos(a), r * sin(a)); } }; typedef Vector Point; int main(int argc, char **argv) { Point a, b, c; cin >> a.x >> a.y >> b.x >> b.y >> c.x >> c.y; printf("%lf\n", abs(Vector::cross(b - a, c - a)) / 2); }
Submission Info
Submission Time | |
---|---|
Task | C - 直訴 |
User | iosink |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 3301 Byte |
Status | AC |
Exec Time | 1 ms |
Memory | 256 KB |
Judge Result
Set Name | all | ||
---|---|---|---|
Score / Max Score | 100 / 100 | ||
Status |
|
Set Name | Test Cases |
---|---|
all | 00_sample_01.txt, 00_sample_02.txt, 00_sample_03.txt, test_01.txt, test_02.txt, test_03.txt, test_04.txt, test_05.txt, test_06.txt, test_07.txt, test_08.txt, test_09.txt, test_10.txt, test_11.txt, test_12.txt, test_13.txt, test_14.txt, test_15.txt, test_16.txt, test_17.txt, test_18.txt, test_19.txt, test_20.txt, test_21.txt, test_22.txt, test_23.txt, test_24.txt, test_25.txt, test_26.txt, test_27.txt, test_28.txt, test_29.txt, test_30.txt, test_31.txt, test_32.txt, test_33.txt, test_34.txt, test_35.txt, test_36.txt, test_37.txt, test_38.txt, test_39.txt, test_40.txt, test_41.txt, test_42.txt, test_43.txt, test_44.txt, test_45.txt, test_46.txt, test_47.txt, test_48.txt, test_49.txt, test_50.txt, test_51.txt, test_52.txt, test_53.txt, test_54.txt, test_55.txt, test_56.txt, test_57.txt, test_58.txt, test_59.txt, test_60.txt, test_61.txt, test_62.txt, test_63.txt, test_64.txt, test_65.txt, test_66.txt, test_67.txt, test_68.txt, test_69.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
00_sample_01.txt | AC | 1 ms | 256 KB |
00_sample_02.txt | AC | 1 ms | 256 KB |
00_sample_03.txt | AC | 1 ms | 256 KB |
test_01.txt | AC | 1 ms | 256 KB |
test_02.txt | AC | 1 ms | 256 KB |
test_03.txt | AC | 1 ms | 256 KB |
test_04.txt | AC | 1 ms | 256 KB |
test_05.txt | AC | 1 ms | 256 KB |
test_06.txt | AC | 1 ms | 256 KB |
test_07.txt | AC | 1 ms | 256 KB |
test_08.txt | AC | 1 ms | 256 KB |
test_09.txt | AC | 1 ms | 256 KB |
test_10.txt | AC | 1 ms | 256 KB |
test_11.txt | AC | 1 ms | 256 KB |
test_12.txt | AC | 1 ms | 256 KB |
test_13.txt | AC | 1 ms | 256 KB |
test_14.txt | AC | 1 ms | 256 KB |
test_15.txt | AC | 1 ms | 256 KB |
test_16.txt | AC | 1 ms | 256 KB |
test_17.txt | AC | 1 ms | 256 KB |
test_18.txt | AC | 1 ms | 256 KB |
test_19.txt | AC | 1 ms | 256 KB |
test_20.txt | AC | 1 ms | 256 KB |
test_21.txt | AC | 1 ms | 256 KB |
test_22.txt | AC | 1 ms | 256 KB |
test_23.txt | AC | 1 ms | 256 KB |
test_24.txt | AC | 1 ms | 256 KB |
test_25.txt | AC | 1 ms | 256 KB |
test_26.txt | AC | 1 ms | 256 KB |
test_27.txt | AC | 1 ms | 256 KB |
test_28.txt | AC | 1 ms | 256 KB |
test_29.txt | AC | 1 ms | 256 KB |
test_30.txt | AC | 1 ms | 256 KB |
test_31.txt | AC | 1 ms | 256 KB |
test_32.txt | AC | 1 ms | 256 KB |
test_33.txt | AC | 1 ms | 256 KB |
test_34.txt | AC | 1 ms | 256 KB |
test_35.txt | AC | 1 ms | 256 KB |
test_36.txt | AC | 1 ms | 256 KB |
test_37.txt | AC | 1 ms | 256 KB |
test_38.txt | AC | 1 ms | 256 KB |
test_39.txt | AC | 1 ms | 256 KB |
test_40.txt | AC | 1 ms | 256 KB |
test_41.txt | AC | 1 ms | 256 KB |
test_42.txt | AC | 1 ms | 256 KB |
test_43.txt | AC | 1 ms | 256 KB |
test_44.txt | AC | 1 ms | 256 KB |
test_45.txt | AC | 1 ms | 256 KB |
test_46.txt | AC | 1 ms | 256 KB |
test_47.txt | AC | 1 ms | 256 KB |
test_48.txt | AC | 1 ms | 256 KB |
test_49.txt | AC | 1 ms | 256 KB |
test_50.txt | AC | 1 ms | 256 KB |
test_51.txt | AC | 1 ms | 256 KB |
test_52.txt | AC | 1 ms | 256 KB |
test_53.txt | AC | 1 ms | 256 KB |
test_54.txt | AC | 1 ms | 256 KB |
test_55.txt | AC | 1 ms | 256 KB |
test_56.txt | AC | 1 ms | 256 KB |
test_57.txt | AC | 1 ms | 256 KB |
test_58.txt | AC | 1 ms | 256 KB |
test_59.txt | AC | 1 ms | 256 KB |
test_60.txt | AC | 1 ms | 256 KB |
test_61.txt | AC | 1 ms | 256 KB |
test_62.txt | AC | 1 ms | 256 KB |
test_63.txt | AC | 1 ms | 256 KB |
test_64.txt | AC | 1 ms | 256 KB |
test_65.txt | AC | 1 ms | 256 KB |
test_66.txt | AC | 1 ms | 256 KB |
test_67.txt | AC | 1 ms | 256 KB |
test_68.txt | AC | 1 ms | 256 KB |
test_69.txt | AC | 1 ms | 256 KB |