oj.uz

답안 #79026

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
79026 2018-10-10T14:58:54 Z szawinis 시간이 돈 (balkan11_timeismoney) C++17
100 / 100
 1150 ms 1136 KB 
/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author szawinis
 */

#include <iostream>
#include <fstream>

#include <bits/stdc++.h>
using namespace std;
#define all(a) begin(a), end(a)
#define csz(a) (int) a.size()
#define load(a, v) fill(begin(a), end(a), v)
#define load_mem(a, v) memset(a, v, sizeof(a));
#define iostream_optimize() ios::sync_with_stdio(false); cin.tie(0);
#define long long long
const long MOD = 1e9+7, LINF = 1e18 + 1e16;
const int INF = 1e9+1;
const double EPS = 1e-10;
const int dx[4] = {-1, 0, 1, 0}, dy[4] = {0, 1, 0, -1};

struct edge {
	int u, v;
	long t, c;
};

class TimeIsMoney {
public:
	int n, m;
	vector<edge> edges;
	pair<long, pair<long, long> > res = {LINF, {LINF, LINF}};
	istream* cin_ptr;
	ostream* cout_ptr;

	void tracer(long T, long C, vector<edge> trace_ls) {
		ostream& cout = *cout_ptr;
		cout << T << ' ' << C << '\n';
		for(edge e: trace_ls) cout << e.u << ' ' << e.v << '\n';
	}

	pair<long, long> gen_mst(long a, long b, bool trace) {
		vector<edge> ls = edges, trace_ls;
		sort(ls.begin(), ls.end(), [a, b] (auto x, auto y) { return x.t * a + x.c * b < y.t * a + y.c * b; });
		vector<int> dsu(n, -1);
		function<int(int)> root;
		root = [&root, &dsu] (int v) { return (dsu[v] < 0 ? v : dsu[v] = root(dsu[v])); };
		pair<long, long> ret = {0, 0};

		for(edge e: ls) {
			int u = root(e.u), v = root(e.v);
			if (u == v) continue;
			dsu[u] += dsu[v];
			dsu[v] = u;
			ret.first += e.t;
			ret.second += e.c;
			if(trace) trace_ls.push_back(e);
		}

		res = min(make_pair(ret.first * ret.second, make_pair(a, b)), res);
		if(trace) tracer(ret.first, ret.second, trace_ls);

		return ret;
	}

	bool ccw(pair<long, long> p1, pair<long, long> p2, pair<long, long> p3) {
		pair<long, long> v1 = {p2.first - p1.first, p2.second - p1.second};
		pair<long, long> v2 = {p3.first - p2.first, p3.second - p2.second};
		long cross = v1.first * v2.second - v1.second * v2.first;
		return cross > 0;
	}

	void rec(pair<long, long> p1, pair<long, long> p2) {
		res.first = min(p1.first * p1.second, res.first);
		res.first = min(p2.first * p2.second, res.first);
		long b = abs(p2.first - p1.first);
		long a = abs(p2.second - p1.second);
		auto opt = gen_mst(a, b, 0);
		if(ccw(p1, opt, p2)) rec(p1, opt), rec(opt, p2);
	}

	void solve(istream& in, ostream& out) {
		cin_ptr = &in;
		cout_ptr = &out;
		istream& cin = *cin_ptr;
		ostream& cout = *cout_ptr;
		cin >> n >> m;
		for(int i = 0; i < m; i++) {
			edge e;
			cin >> e.u >> e.v >> e.t >> e.c;
			edges.push_back(e);
		}
		auto leftmost = gen_mst(1, 0, 0);
		auto bottommost = gen_mst(0, 1, 0);
		rec(leftmost, bottommost);
		gen_mst(res.second.first, res.second.second, 1);
	}
};

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	TimeIsMoney solver;
	std::istream& in(std::cin);
	std::ostream& out(std::cout);
	solver.solve(in, out);
	return 0;
}

Compilation message

timeismoney.cpp: In member function 'void TimeIsMoney::solve(std::istream&, std::ostream&)':
timeismoney.cpp:86:12: warning: unused variable 'cout' [-Wunused-variable]
   ostream& cout = *cout_ptr;
            ^~~~

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 500 KB Output is correct
3 Correct 2 ms 500 KB Output is correct
4 Correct 2 ms 500 KB Output is correct
5 Correct 2 ms 500 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 4 ms 516 KB Output is correct
8 Correct 9 ms 1048 KB Output is correct
9 Correct 2 ms 1048 KB Output is correct
10 Correct 2 ms 1048 KB Output is correct
11 Correct 2 ms 1048 KB Output is correct
12 Correct 2 ms 1048 KB Output is correct
13 Correct 2 ms 1048 KB Output is correct
14 Correct 10 ms 1048 KB Output is correct
15 Correct 7 ms 1048 KB Output is correct
16 Correct 140 ms 1048 KB Output is correct
17 Correct 148 ms 1048 KB Output is correct
18 Correct 147 ms 1048 KB Output is correct
19 Correct 1150 ms 1136 KB Output is correct
20 Correct 1126 ms 1136 KB Output is correct