結果
| 問題 | No.1041 直線大学 |
| コンテスト | |
| ユーザー |
yukinon0808
|
| 提出日時 | 2020-05-01 21:28:14 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 5 ms / 2,000 ms |
| コード長 | 5,402 bytes |
| コンパイル時間 | 1,613 ms |
| コンパイル使用メモリ | 172,204 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-11-16 07:45:00 |
| 合計ジャッジ時間 | 2,698 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 37 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define SZ(x) (int)(x.size())
#define REP(i, n) for(int i=0;i<(n);++i)
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define RREP(i, n) for(int i=(int)(n)-1;i>=0;--i)
#define RFOR(i, a, b) for(int i=(int)(b)-1;i>=(a);--i)
#define ALL(a) a.begin(),a.end()
#define DUMP(x) cerr<<#x<<" = "<<(x)<<endl
#define DEBUG(x) cerr<<#x<<" = "<<(x)<<" (L"<<__LINE__<<")"<< endl;
using ll = long long;
using vi = vector<int>;
using vvi = vector<vi>;
using vll = vector<ll>;
using vvll = vector<vll>;
using P = pair<int, int>;
const double EPS = 1e-8;
const ll MOD = 1000000007;
const int INF = INT_MAX / 2;
const ll LINF = LLONG_MAX / 2;
template <typename T1, typename T2>
bool chmax(T1 &a, const T2 &b) {
if (a < b) { a = b; return true; }
return false;
}
template <typename T1, typename T2>
bool chmin(T1 &a, const T2 &b) {
if (a > b) { a = b; return true; }
return false;
}
template<typename T1, typename T2>
ostream &operator<<(ostream &os, const map<T1, T2> &mp);
template<typename T>
ostream &operator<<(ostream &os, const vector<T> &v);
template<typename T1, typename T2>
ostream &operator<<(ostream &os, const pair<T1, T2> &p) {
os << "(" << p.first << ":" << p.second << ")";
return os;
}
template<typename T1, typename T2>
ostream &operator<<(ostream &os, const map<T1, T2> &mp) {
os << "{";
int a = 0;
for (auto &tp : mp) {
if (a) os << ", "; a = 1;
os << tp;
}
return os << "}";
}
template<typename T>
ostream &operator<<(ostream &os, const vector<T> &v) {
os << "[";
REP(i, SZ(v)) {
if (i) os << ", ";
os << v[i];
}
return os << "]";
}
using Real = double;
const Real PI = acos(-1);
using Point = complex<Real>;
namespace std {
bool operator<(const Point& a, const Point& b) {
if (a.real() == b.real()) return a.imag() < b.imag();
return a.real() < b.real();
}
}
struct Line {
Point a, b;
Line() {}
Line(const Point& a, const Point& b) : a(a), b(b) {}
friend ostream& operator<<(ostream& os, const Line& l) {
return os << "[" << l.a << "," << l.b << "]";
}
};
struct Segment : Line {
Segment() = default;
Segment(const Point& a, const Point& b) : Line(a, b) {}
};
inline bool eq(Real a, Real b) { return abs(b - a) < EPS; }
Real radian_to_degree(Real r) {
return r * 180.0 / PI;
}
Real degree_to_radian(Real d) {
return d * PI / 180.0;
}
Point rotate(const Point &p, Real theta) {
return p * polar((Real)1.0, theta);
}
Real cross(const Point& a, const Point& b) {
return a.real() * b.imag() - a.imag() * b.real();
}
Real dot(const Point& a, const Point& b) {
return a.real() * b.real() + a.imag() * b.imag();
}
Point projection(const Line& l, const Point& p) {
Real A = dot(l.b - l.a, p - l.a),
B = dot(l.a - l.b, p - l.b);
return (A * l.b + B * l.a) / (A + B);
}
bool parallel(const Line& l1, const Line& l2) {
return eq(cross(l1.a - l1.b, l2.a - l2.b), 0.0);
}
bool orthogonal(const Line& l1, const Line& l2) {
return eq(dot(l1.a - l1.b, l2.a - l2.b), 0.0);
}
const int COUNTER_CLOCKWISE = 1,
CLOCKWISE = -1,
ONLINE_BACK = 2,
ONLINE_FRONT = -2,
ON_SEGMENT = 0;
int ccw(const Point& a, Point b, Point c) {
b = b - a, c = c - a;
if (cross(b, c) > EPS) return COUNTER_CLOCKWISE;
if (cross(b, c) < -EPS) return CLOCKWISE;
if (dot(b, c) < 0) return ONLINE_BACK;
if (norm(b) < norm(c)) return ONLINE_FRONT;
return ON_SEGMENT;
}
bool intersected(const Line& l, const Point& p) {
return abs(ccw(l.a, l.b, p)) != 1;
}
bool intersected(const Segment& s, const Point& p) {
return ccw(s.a, s.b, p) == 0;
}
bool intersected(const Line& l, const Segment& s) {
return cross(l.b - l.a, s.a - l.a) * cross(l.b - l.a, s.b - l.a) < EPS;
}
bool intersected(const Segment& s1, const Segment& s2) {
return ccw(s1.a, s1.b, s2.a) * ccw(s1.a, s1.b, s2.b) <= 0 and
ccw(s2.a, s2.b, s1.a) * ccw(s2.a, s2.b, s1.b) <= 0;
}
Real distance(const Line& l, const Point& p) {
return abs(p - projection(l, p));
}
Real distance(const Segment& s, const Point& p) {
Point r = projection(s, p);
if (intersected(s, r)) return abs(r - p);
return min(abs(s.a - p), abs(s.b - p));
}
Real distance(const Line &l, const Segment &s) {
if (intersected(l, s)) return 0;
return min(distance(l, s.a), distance(l, s.b));
}
Real distance(const Segment& s1, const Segment& s2) {
if (intersected(s1, s2)) return 0.0;
return min({ distance(s1, s2.a), distance(s1, s2.b),
distance(s2, s1.a), distance(s2, s1.b) });
}
Point crosspoint(const Line& l1, const Line& l2) {
Real A = cross(l2.a - l1.a, l2.b - l1.a),
B = cross(l2.b - l1.b, l2.a - l1.b);
return (A * l1.b + B * l1.a) / (A + B);
}
int main() {
cin.tie(0);
ios::sync_with_stdio(false);
cout << fixed << setprecision(10);
int n; cin >> n;
vector<Point> p(n);
REP(i, n) {
double x, y; cin >> x >> y;
p[i] = {x, y};
}
int ans = 0;
REP(i, n) {
FOR(j, i+1, n) {
int cnt = 2;
REP(k, n) {
if (i == k or j == k) continue;
if (abs(ccw(p[i], p[j], p[k])) != 1) ++cnt;
}
chmax(ans, cnt);
}
}
cout << ans << endl;
return 0;
}
yukinon0808