結果
| 問題 |
No.622 点と三角柱の内外判定
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2017-12-22 00:40:18 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 3 ms / 1,500 ms |
| コード長 | 1,789 bytes |
| コンパイル時間 | 2,119 ms |
| コンパイル使用メモリ | 194,704 KB |
| 最終ジャッジ日時 | 2025-01-05 06:10:10 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 32 |
ソースコード
#include <bits/stdc++.h>
#define VARNAME(x) #x
#define show(x) cerr << #x << " = " << x << endl
using namespace std;
using ll = __int128_t;
using ld = long double;
template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
os << "sz:" << v.size() << "\n[";
for (const auto& p : v) {
os << p << ",";
}
os << "]\n";
return os;
}
template <typename S, typename T>
ostream& operator<<(ostream& os, const pair<S, T>& p)
{
os << "(" << p.first << "," << p.second
<< ")";
return os;
}
constexpr ll MOD = (ll)1e9 + 7LL;
constexpr ld PI = static_cast<ld>(3.1415926535898);
template <typename T>
constexpr T INF = numeric_limits<T>::max() / 10;
struct Vec {
ll dx;
ll dy;
ll dz;
ll dot(const Vec& v)
{
return (dx * v.dx + dy * v.dy + dz * v.dz);
}
};
int main()
{
cin.tie(0);
ios::sync_with_stdio(false);
long long x1_, y1_, z1_, x2_, y2_, z2_, x3_, y3_, z3_, x4_, y4_, z4_;
cin >> x1_ >> y1_ >> z1_ >> x2_ >> y2_ >> z2_ >> x3_ >> y3_ >> z3_ >> x4_ >> y4_ >> z4_;
const ll x1 = x1_;
const ll y1 = y1_;
const ll z1 = z1_;
const ll x2 = x2_;
const ll y2 = y2_;
const ll z2 = z2_;
const ll x3 = x3_;
const ll y3 = y3_;
const ll z3 = z3_;
const ll x4 = x4_;
const ll y4 = y4_;
const ll z4 = z4_;
Vec v1{x2 - x1, y2 - y1, z2 - z1};
Vec v2{x3 - x1, y3 - y1, z3 - z1};
Vec v3{x4 - x1, y4 - y1, z4 - z1};
const ll ab = v1.dot(v2);
const ll n1 = v1.dot(v1);
const ll n2 = v2.dot(v2);
const ll ac = v1.dot(v3);
const ll bc = v2.dot(v3);
const ll x = n2 * ac - ab * bc;
const ll y = -ab * ac + n1 * bc;
cout << (x > 0 and y > 0 and x + y < n1 * n2 - ab * ab ? "YES" : "NO") << endl;
return 0;
}