結果

問題 No.2354 Poor Sight in Winter
ユーザー kaikeykaikey
提出日時 2023-06-16 22:28:40
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 393 ms / 2,000 ms
コード長 4,868 bytes
コンパイル時間 2,489 ms
コンパイル使用メモリ 219,240 KB
実行使用メモリ 11,596 KB
最終ジャッジ日時 2024-06-24 15:04:35
合計ジャッジ時間 7,087 ms
ジャッジサーバーID
(参考情報)
judge1 / judge4
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
6,812 KB
testcase_01 AC 2 ms
6,940 KB
testcase_02 AC 2 ms
6,944 KB
testcase_03 AC 2 ms
6,944 KB
testcase_04 AC 2 ms
6,940 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 AC 2 ms
6,940 KB
testcase_07 AC 2 ms
6,944 KB
testcase_08 AC 2 ms
6,940 KB
testcase_09 AC 2 ms
6,940 KB
testcase_10 AC 2 ms
6,940 KB
testcase_11 AC 362 ms
11,448 KB
testcase_12 AC 377 ms
11,392 KB
testcase_13 AC 393 ms
11,592 KB
testcase_14 AC 386 ms
11,592 KB
testcase_15 AC 371 ms
11,464 KB
testcase_16 AC 381 ms
11,464 KB
testcase_17 AC 380 ms
11,596 KB
testcase_18 AC 138 ms
7,316 KB
testcase_19 AC 255 ms
9,912 KB
testcase_20 AC 164 ms
7,964 KB
testcase_21 AC 11 ms
6,940 KB
testcase_22 AC 71 ms
6,940 KB
testcase_23 AC 73 ms
6,944 KB
testcase_24 AC 230 ms
9,408 KB
testcase_25 AC 50 ms
6,944 KB
testcase_26 AC 41 ms
6,944 KB
testcase_27 AC 4 ms
6,944 KB
testcase_28 AC 7 ms
6,940 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include "bits/stdc++.h"
#include <random>
#include <chrono>
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define SZ(x) ((lint)(x).size())
#define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i)
#define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
#define endk '\n'
using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld;
struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(30); }; } fast_ios_;
template<class T> auto add = [](T a, T b) -> T { return a + b; };
template<class T> auto mul = [](T a, T b) -> T { return a * b; };
template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); };
template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); };
template<class T> using V = vector<T>;
using Vl = V<lint>; using VVl = V<Vl>; using VVVl = V<V<Vl>>;
template< typename T > ostream& operator<<(ostream& os, const vector< T >& v) {
	for (int i = 0; i < (int)v.size(); i++) os << v[i] << (i + 1 != v.size() ? " " : "");
	return os;
}
template< typename T >istream& operator>>(istream& is, vector< T >& v) {
	for (T& in : v) is >> in;
	return is;
}
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
template <class T>
T div_floor(T a, T b) {
	if (b < 0) a *= -1, b *= -1;
	return a >= 0 ? a / b : (a + 1) / b - 1;
}
template <class T>
T div_ceil(T a, T b) {
	if (b < 0) a *= -1, b *= -1;
	return a > 0 ? (a - 1) / b + 1 : a / b;
}
template <class F> struct rec {
	F f;
	rec(F&& f_) : f(std::forward<F>(f_)) {}
	template <class... Args> auto operator()(Args &&... args) const {
		return f(*this, std::forward<Args>(args)...);
	}
};
lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); }
lint digit(lint a) { return (lint)log10(a); }
lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); }
lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); }
bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => true
void Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); }
const long long MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 1e18;
lint dx[8] = { 0, 1, 0, -1, 1, -1, 1, -1 }, dy[8] = { 1, 0, -1, 0, -1, -1, 1, 1 };
bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endk; return flag; }
struct Edge {
	lint from, to;
	lint cost;
	Edge() {

	}
	Edge(lint u, lint v, lint c) {
		cost = c;
		from = u;
		to = v;
	}
	bool operator<(const Edge& e) const {
		return cost < e.cost;
	}
};
struct WeightedEdge {
	lint to;
	lint cost;
	WeightedEdge(lint v, lint c) {
		to = v;
		cost = c;
	}
	bool operator<(const WeightedEdge& e) const {
		return cost < e.cost;
	}
};
using WeightedGraph = V<V<WeightedEdge>>;
typedef pair<plint, lint> tlint;
typedef pair<ld, ld> pld;
typedef pair<plint, plint> qlint;
typedef pair<Edge, lint> pEd;
typedef pair<lint, Vl> vVl;
typedef pair<set<lint>, set<lint>> pset;

Vl Dijkstra(WeightedGraph& g, int s) {
	Vl dist(SZ(g), INF);
	deque<bool> visited(SZ(g), false);
	priority_queue<plint> que;
	que.push({ 0, s });
	dist[s] = 0;
	while (!que.empty()) {
		plint curr = que.top(); que.pop();
		if (visited[curr.second]) continue;
		visited[curr.second] = true;
		if (dist[curr.second] < curr.first) continue;
		for (auto nxt : g[curr.second]) {
			if (visited[nxt.to]) continue;
			if (dist[nxt.to] > dist[curr.second] + nxt.cost) {
				dist[nxt.to] = dist[curr.second] + nxt.cost;
				que.emplace(-dist[nxt.to], nxt.to);
			}
		}
	}
	return dist;
}

int main() {
	lint N, K;
	cin >> N >> K;
	plint s, t;
	{
		lint x, y;
		cin >> x >> y; s = { x, y };
	}
	{
		lint x, y;
		cin >> x >> y; t = { x, y };
	}
	V<plint> arr;
	arr.push_back(s);
	REP(i, N) {
		lint x, y;
		cin >> x >> y; arr.push_back({ x, y });
	}
	arr.push_back(t);
	N = N + 2;

	auto check = [&](lint val) {
		WeightedGraph g(N);
		REP(i, N) {
			REP(j, N) {
				if (i == j) continue;
				auto [x1, y1] = arr[i];
				auto [x2, y2] = arr[j];
				lint d = (abs(x1 - x2) + abs(y1 - y2) - 1) / val;
				g[i].push_back({ j, d });
				g[j].push_back({ i, d });
			}
		}

		auto v = Dijkstra(g, 0);
		return v[N - 1] <= K;
	};

	lint ng = 0, ok = 1e9 + 1;
	while (ok - ng > 1) {
		lint mid = (ok + ng) / 2;
		if (check(mid)) ok = mid;
		else ng = mid;
	}
	cout << ok << endl;
}
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