oj.uz

Submission #222852

# Submission time Handle Problem Language Result Execution time Memory
222852 2020-04-14T08:34:03 Z staniewzki Dreaming (IOI13_dreaming) C++17
18 / 100
 87 ms 17392 KB 
#include<bits/stdc++.h>
using namespace std;
 
#define REP(i, n) for(int i = 0; i < n; i++)
#define FOR(i, a, b) for(int i = a; i <= b; i++)
#define ST first
#define ND second
 
ostream& operator<<(ostream &out, string str) {
	for(char c : str) out << c;
	return out;
}
 
template<class L, class R> ostream& operator<<(ostream &out, pair<L, R> p) {
	return out << "(" << p.ST << ", " << p.ND << ")";
}
 
template<class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) {
	out << "{";
	for(auto it = a.begin(); it != a.end(); it = next(it))
		out << (it != a.begin() ? ", " : "") << *it;
	return out << "}";
}
 
void dump() { cerr << "\n"; }
template<class T, class... Ts> void dump(T a, Ts... x) {
	cerr << a << ", ";
	dump(x...);
}
 
#ifdef DEBUG
#  define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__)
#else
#  define debug(...) false
#endif
 
template<class T> int size(T && a) { return (int) a.size(); }
 
using LL = long long;
using PII = pair<int, int>;

#include "dreaming.h"

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	vector<vector<PII>> adj(N);
	REP(i, M) {
		adj[A[i]].emplace_back(B[i], T[i]);
		adj[B[i]].emplace_back(A[i], T[i]);
	}

	vector<int> dst(N, -1), component;
	function<void(int, bool)> get_dst = [&](int v, bool get_comp) {
		if(get_comp) component.emplace_back(v);
		if(dst[v] == -1) dst[v] = 0;
		for(auto &[u, w] : adj[v]) {
			if(dst[u] == -1) {
				dst[u] = dst[v] + w;
				get_dst(u, get_comp);
			}
		}
	};

	auto clear_dst = [&]() {
		for(int i : component)
			dst[i] = -1;
	};

	int inf = (int) 1e9;
	vector<int> cen(N), q = {-inf, -inf};
	REP(i, N) if(dst[i] == -1) {
		auto get_far = [&](int x) {
			clear_dst();
			get_dst(x, false);
			PII best = {-1, -1};
			for(int j : component) 
				best = max(best, {dst[j], j});
			return best.ND;
		};

		auto update_cen = [&]() {
			int ret = inf;
			for(int j : component) {
				cen[j] = max(cen[j], dst[j]);
				ret = min(ret, cen[j]);
			}
			return ret;
		};

		get_dst(i, true);

		int a = get_far(i);
		int b = get_far(a);
		update_cen();
		get_far(b);
		q.emplace_back(update_cen());

		component.clear();
	}

	sort(q.rbegin(), q.rend());
	return max({q[0], q[0] + L + q[1], q[1] + 2 * L + q[2]});
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 87 ms 17392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 87 ms 17392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 87 ms 17392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 6400 KB Output is correct
2 Correct 38 ms 6392 KB Output is correct
3 Correct 39 ms 6392 KB Output is correct
4 Correct 37 ms 6392 KB Output is correct
5 Correct 37 ms 6400 KB Output is correct
6 Correct 43 ms 7032 KB Output is correct
7 Correct 39 ms 6656 KB Output is correct
8 Correct 39 ms 6264 KB Output is correct
9 Correct 36 ms 6272 KB Output is correct
10 Correct 37 ms 6656 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 17 ms 4092 KB Output is correct
13 Correct 15 ms 4220 KB Output is correct
14 Correct 15 ms 4220 KB Output is correct
15 Correct 15 ms 4220 KB Output is correct
16 Correct 14 ms 4092 KB Output is correct
17 Correct 14 ms 4124 KB Output is correct
18 Correct 26 ms 4220 KB Output is correct
19 Correct 14 ms 4220 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 512 KB Output is correct
23 Correct 14 ms 4092 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 87 ms 17392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 87 ms 17392 KB Output isn't correct
2 Halted 0 ms 0 KB -