/*************************************
* author: marvinthang *
* created: 11.03.2024 09:22:47 *
*************************************/
#include "nice_lines.h"
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define left ___left
#define right ___right
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define MASK(i) (1LL << (i))
#define BIT(x, i) ((x) >> (i) & 1)
#define __builtin_popcount __builtin_popcountll
#define ALL(v) (v).begin(), (v).end()
#define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i)
#define REPD(i, n) for (int i = (n); i-- > 0; )
#define FOR(i, a, b) for (int i = (a), _b = (b); i < _b; ++i)
#define FORD(i, b, a) for (int i = (b), _a = (a); --i >= _a; )
#define FORE(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORDE(i, b, a) for (int i = (b), _a = (a); i >= _a; --i)
#define scan_op(...) istream & operator >> (istream &in, __VA_ARGS__ &u)
#define print_op(...) ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
#include "debug.h"
#else
#define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
#define DB(...) 23
#define db(...) 23
#define debug(...) 23
#endif
template <class U, class V> scan_op(pair <U, V>) { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>) { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>) { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")"; else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
// end of template
#define double long double
const double EPS = 1e-5;
const int MAX_C = 1e4 + 5;
const int PX = MAX_C * 2 + 1;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
template <class T> T rand(T l, T h) { return uniform_int_distribution <T> (l, h) (rng); }
template <class T> T rand(T h) { return uniform_int_distribution <T> (0, h - 1) (rng); }
struct Point {
int x; double y;
Point(int x = 0, double y = 0): x(x), y(y) {}
};
struct Line {
Point m, n;
double a, b;
Line(const Point &_m, const Point &_n) {
m = _m; n = _n;
a = (m.y - n.y) / (m.x - n.x);
b = m.y - a * m.x;
}
int intersectX(const Line &ot) const {
return floor((ot.b - b) / (a - ot.a));
}
};
void solve(int subtask_id, int n) {
auto collinear = [&] (const Point &a, const Point &b, const Point &c) {
return abs((b.x - a.x) * (c.y - a.y) - (c.x - a.x) * (b.y - a.y)) <= EPS;
};
auto getPoint = [&] (int x) {
return Point(x, query(PX, x));
};
auto getLine = [&] (int x, int f) {
return Line(getPoint(x), getPoint(x + f));
};
vector <int> aa, bb;
cout << setprecision(5) << fixed;
int cnt = 0;
auto solve = [&] (auto &&solve, const Line &left, const Line &right) {
if ((int) aa.size() == n) return;
if (abs(left.a - right.a) <= EPS) return;
int m = left.intersectX(right);
Line mid = getLine(m, 1);
if (collinear(left.m, left.n, mid.m) && collinear(right.m, right.n, mid.m)) {
int b = m % PX;
if (b < 0) b += PX;
if (b > MAX_C) b -= PX;
aa.push_back((m - b) / PX);
bb.push_back(b);
return;
}
solve(solve, left, mid);
solve(solve, mid, right);
};
int r = PX * MAX_C + MAX_C;
int l = -r;
solve(solve, getLine(l - MAX_C, MAX_C), getLine(r, MAX_C));
the_lines_are(aa, bb);
}
Compilation message
nicelines.cpp: In function 'void solve(int, int)':
nicelines.cpp:85:9: warning: unused variable 'cnt' [-Wunused-variable]
85 | int cnt = 0;
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
436 KB |
Output is correct |
| 2 |
Correct |
1 ms |
436 KB |
Output is correct |
| 3 |
Incorrect |
75 ms |
2096 KB |
Incorrect |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
73 ms |
2268 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
81 ms |
2664 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
75 ms |
2096 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
91 ms |
2440 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
75 ms |
2096 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
