oj.uz

Submission #944454

# Submission time Handle Problem Language Result Execution time Memory
944454 2024-03-12T17:57:53 Z daoquanglinh2007 Nicelines (RMI20_nicelines) C++17
77.7582 / 100
 43 ms 960 KB 
#include <bits/stdc++.h>
#include "nice_lines.h"
using namespace std;
 
#define ll long long
#define ld long double
#define pii pair <int, int>
#define pld pair <ld, ld>
#define fi first
#define se second
#define mp make_pair
 
const ll LIM = 1e4;

const ld EPS = 1e-9, inf = 1e18;

struct line{
	ld a, b, c;
};

ll MAX_DEP = 32, x0 = 2*LIM+10;
vector <int> va, vb;
vector <ld> pos, neg;
set <pii> S;
 
void get(ld y){
	int b = int(round(y+x0*LIM+LIM))%x0-LIM, a = int(round(y-b)/(ld)x0);
	if (!S.count(mp(a, b))){
		va.push_back(a);
		vb.push_back(b);
		S.insert(mp(a, b));
		if (x0 > 0) pos.push_back(y); else neg.push_back(y);
	}
}
 
void dnc(int dep, ld l, ld r, ld fl, ld fr){
	if (dep == MAX_DEP){
		get((l+r)/2.0);
		return;
	}
	ld mid = (l+r)/2.0;
	if (fl == +inf) fl = query(x0, l);
	if (fr == +inf) fr = query(x0, r);
	ld fmid = query(x0, mid);
	if (abs(2.0*fmid - (fl+fr)) <= EPS) return;
	dnc(dep+1, l, mid, fl, fmid);
	dnc(dep+1, mid, r, fmid, fr);
}

line calc(pld A, pld B){
	line d;
	d.a = A.se-B.se, d.b = B.fi-A.fi, d.c = -A.fi*(A.se-B.se)-A.se*(B.fi-A.fi);
	return d;
}
 
void solve(int subtask_id, int N){
	if (N <= 3) MAX_DEP = 35;
	dnc(0, -2*LIM*(x0+1), 2*LIM*(x0+1), +inf, +inf);
	if (N <= 3){
		x0 = -x0;
		dnc(0, -2*LIM*(-x0+1), 2*LIM*(-x0+1), +inf, +inf);
		va.clear(); vb.clear();
		assert((int)pos.size() >= N);
		assert((int)neg.size() >= N);
		sort(pos.begin(), pos.end(), greater <ld>());
		sort(neg.begin(), neg.end());
		for (int i = 0; i < N; i++){
			line d = calc(mp(-x0, pos[i]), mp(x0, neg[i]));
			int a = round(-d.a/d.b), b = round(-d.c/d.b);
			va.push_back(a);
			vb.push_back(b);
		}
	}
	the_lines_are(va, vb);
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 436 KB Output is correct
2 Correct 1 ms 448 KB Output is correct
3 Correct 1 ms 448 KB Output is correct
4 Correct 2 ms 440 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 436 KB Output is correct
2 Correct 2 ms 436 KB Output is correct
3 Correct 2 ms 448 KB Output is correct
4 Correct 2 ms 452 KB Output is correct

Subtask #3
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 692 KB Output is correct
2 Runtime error 2 ms 616 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4
14.1625026041 / 19.0

# Verdict Execution time Memory Grader output
1 Partially correct 39 ms 688 KB Output is partially correct
2 Partially correct 28 ms 704 KB Output is partially correct
3 Partially correct 26 ms 960 KB Output is partially correct
4 Partially correct 30 ms 448 KB Output is partially correct

Subtask #5
21.1162429669 / 23.0

# Verdict Execution time Memory Grader output
1 Partially correct 13 ms 448 KB Output is partially correct
2 Partially correct 12 ms 704 KB Output is partially correct
3 Partially correct 12 ms 452 KB Output is partially correct
4 Partially correct 11 ms 452 KB Output is partially correct

Subtask #6
18.4794436341 / 27.0

# Verdict Execution time Memory Grader output
1 Partially correct 39 ms 688 KB Output is partially correct
2 Partially correct 28 ms 704 KB Output is partially correct
3 Partially correct 26 ms 960 KB Output is partially correct
4 Partially correct 30 ms 448 KB Output is partially correct
5 Partially correct 13 ms 448 KB Output is partially correct
6 Partially correct 12 ms 704 KB Output is partially correct
7 Partially correct 12 ms 452 KB Output is partially correct
8 Partially correct 11 ms 452 KB Output is partially correct
9 Partially correct 43 ms 704 KB Output is partially correct
10 Partially correct 35 ms 940 KB Output is partially correct
11 Partially correct 36 ms 688 KB Output is partially correct
12 Partially correct 32 ms 688 KB Output is partially correct