Submission #3423779
Source Code Expand
#include <cmath> #include <iomanip> #include <iostream> using namespace std; #define gsort(b, e) sort(b, e, greater<decltype(*b)>()) template <typename T> T sq(T a) { return a * a; } int main() { double x[3], y[3]; for (int i = 0; i < 3; ++i) { cin >> x[i] >> y[i]; } // (x[0], y[0])を原点に平行移動 for (int i = 2; i >= 0; --i) { x[i] -= x[0]; y[i] -= y[0]; } // 三角形の面積 double S = abs(x[1] * y[2] - x[2] * y[1]) / 2; // 各辺の長さ double r[3]; for (int i = 0; i < 3; ++i) { r[i] = sqrt(sq(x[i] - x[(i + 1) % 3]) + sq(y[i] - y[(i + 1) % 3])); } // 内接円の半径 double z = S * 2 / (r[0] + r[1] + r[2]); gsort(r, r + 3); double ok = 0, ng = 1000; for (int i = 0; i < 100; ++i) { double mid = (ok + ng) / 2; if (mid * 2 <= r[0] * (1 - mid / z)) { ok = mid; } else { ng = mid; } } cout << fixed << setprecision(15) << ok << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Inscribed Bicycle |
User | Tiramister |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1098 Byte |
Status | CE |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:5:55: error: ‘sort’ was not declared in this scope #define gsort(b, e) sort(b, e, greater<decltype(*b)>()) ^ ./Main.cpp:35:5: note: in expansion of macro ‘gsort’ gsort(r, r + 3); ^