oj.uz

답안 #411298

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
411298 2021-05-25T01:01:15 Z islander7 꿈 (IOI13_dreaming) C++17
40 / 100
 1000 ms 60908 KB 
#include "dreaming.h"
#include <iostream>
#include <queue>
#include <map>
#include <vector>
#include <algorithm>
#define ll long long
#define pii pair <ll, int>
using namespace std;
int travelTime(int N, int M, int L, int A[], int B[], int T[])
{
	map <int, vector <pii>> adj;
	map <int, vector <int>> cc;
	map <pii, int> edges;
	map <int, int> ccnum;
	int maxgrp;
	ll maxlen = 0;
	map <int, int> roots;
	map <int, int> layer;
	vector <int> mins;
	ll m1 = -1, m2 = -1, m3 = -1;
	for (int i = 0; i < M; i++)
	{
		adj[A[i]].push_back(make_pair(B[i], T[i]));
		adj[B[i]].push_back(make_pair(A[i], T[i]));
		edges[make_pair(A[i], B[i])] = T[i];
		edges[make_pair(B[i], A[i])] = T[i];
	}
	int cur = 0;
	for (int i = 0; i < N; i++)
	{
		ccnum[i] = -1;
	}
	for (int i = 0; i < N; i++)
	{
		if (ccnum[i] == -1)
		{
			queue <int> curs;
			curs.push(i);
			ccnum[i] = cur;
			while (!curs.empty())
			{
				int a = curs.front();
				curs.pop();
				for (auto x : adj[a])
				{
					if (ccnum[x.first] == -1)
					{
						ccnum[x.first] = cur;
						curs.push(x.first);
					}
				}
			}
			cur++;
		}
	}
	for (int i = 0; i < N; i++)
	{
		cc[ccnum[i]].push_back(i);
		layer[i] = -1;
	}
	maxgrp = cur - 1;
	for (int i = 0; i <= maxgrp; i++)
	{
		if (cc[i].size() == 1)
		{
			if (m3 < 0)
			{
				m3 = 0;
				if (m3 > m2)
				{
					swap(m3, m2);
					if (m2 > m1)
					{
						swap(m2, m1);
					}
				}
			}
			continue;
		}
		bool path = true;
		roots[i] = cc[i][0];
		queue <pii> depth;
		layer[roots[i]] = 0;
		depth.push(make_pair(roots[i], 0));
		map <int, vector <int>> layers;
		layers[0].push_back(roots[i]);
		int maxlayer = 0;
		map <int, vector <int>> children;
		map <int, int> parent;
		map <int, pii> big;
		for (int a : cc[i])
		{
			parent[a] = -1;
		}
		while (!depth.empty())
		{
			pii a = depth.front();
			depth.pop();
			for (pii b : adj[a.first])
			{
				if (layer[b.first] == -1)
				{
					depth.push(make_pair(b.first, a.second + 1));
					layer[b.first] = a.second + 1;
					layers[a.second + 1].push_back(b.first);
					maxlayer = max(maxlayer, a.second + 1);
					children[a.first].push_back(b.first);
					if (children[a.first].size() >= 2)
					{
						path = false;
					}
					parent[b.first] = a.first;
				}
			}
		}
		queue <int> calc;
		map <int, bool> seen;
		seen[-1] = true;
		map <int, int> cseen;
		for (int a : cc[i])
		{
			if (children[a].size() == 0)
			{
				calc.push(a);
				seen[a] = true;
			}
		}
		while (!calc.empty())
		{
			int a = calc.front();
			calc.pop();
			if (!seen[parent[a]])
			{
				cseen[parent[a]]++;
				if (cseen[parent[a]] == children[parent[a]].size())
				{
					calc.push(parent[a]);
					seen[parent[a]] = true;
				}
			}
			if (children[a].size() == 0)
			{
				big[a] = make_pair(0, a);
				continue;
			}
			pii x = make_pair(-1, -1);
			for (int b : children[a])
			{
				int l1 = big[b].first;
				if (l1 >= 0 && l1 + edges[make_pair(a, b)] > x.first)
				{
					x.first = l1 + edges[make_pair(a, b)];
					x.second = big[b].second;
				}
			}
			big[a] = x;
		}
		int start = -1;
		int end = -1;
		int common = -1;
		ll length = 0;
		ll tot = 0;
		if (path)
		{
			start = roots[i];
			int a = roots[i];
			while (children[a].size() > 0)
			{
				length += edges[make_pair(a, children[a][0])];
				a = children[a][0];
			}
			end = a;
		}
		else
		{
			for (int a : cc[i])
			{
				pii max1 = make_pair(0, 0);
				pii max2 = make_pair(0, 0);
				if (children[a].size() >= 2)
				{
					for (int b : children[a])
					{
						if (edges[make_pair(a, b)] + big[b].first > max2.first)
						{
							max2 = make_pair(edges[make_pair(a, b)] + big[b].first, big[b].second);
							if (max2 > max1)
							{
								swap(max2, max1);
							}
						}
					}
					if (max1.first + max2.first > length)
					{
						length = max1.first + max2.first;
						start = max1.second;
						end = max2.second;
						common = a;
						path = false;
					}
				}
				else if (children[a].size() == 1)
				{
					if (big[a].first > length)
					{
						length = big[a].first;
						start = a;
						end = big[a].second;
						common = a;
						path = true;
					}
				}
			}
		}
		if (length > maxlen)
		{
			maxlen = length;
		}
		int curpos;
		if (path)
		{
			curpos = end;
		}
		else
		{
			curpos = start;
		}
		int minmax = 0;
		while (tot * 2 < length)
		{
			tot += edges[make_pair(curpos, parent[curpos])];
			if (tot * 2 == length)
			{
				minmax = tot;
			}
			if (tot * 2 > length)
			{
				if (tot * 2 - edges[make_pair(curpos, parent[curpos])] >= length)
				{
					minmax = length - tot + edges[make_pair(curpos, parent[curpos])];
				}
				else
				{
					minmax = tot;
				}
			}
			curpos = parent[curpos];
		}
		if (m3 < minmax)
		{
			m3 = minmax;
			if (m3 > m2)
			{
				swap(m3, m2);
				if (m2 > m1)
				{
					swap(m2, m1);
				}
			}
		}
	}
	if (m2 == -1)
	{
		return max(maxlen, m1);
	}
	else if (m3 == -1)
	{
		return max(maxlen, m1 + L + m2);
	}
	else
	{
		return max(maxlen, max(m1 + L + m2, m2 + m3 + 2 * L));
	}
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:136:26: warning: comparison of integer expressions of different signedness: 'std::map<int, int>::mapped_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  136 |     if (cseen[parent[a]] == children[parent[a]].size())
dreaming.cpp:161:7: warning: variable 'common' set but not used [-Wunused-but-set-variable]
  161 |   int common = -1;
      |       ^~~~~~

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1059 ms 60908 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 2 ms 332 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1059 ms 60908 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 418 ms 30920 KB Output is correct
2 Correct 405 ms 30976 KB Output is correct
3 Correct 408 ms 30912 KB Output is correct
4 Correct 410 ms 31080 KB Output is correct
5 Correct 443 ms 30788 KB Output is correct
6 Correct 457 ms 32708 KB Output is correct
7 Correct 439 ms 32316 KB Output is correct
8 Correct 412 ms 30404 KB Output is correct
9 Correct 394 ms 30184 KB Output is correct
10 Correct 495 ms 32068 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 140 ms 28404 KB Output is correct
13 Correct 173 ms 28456 KB Output is correct
14 Correct 145 ms 28456 KB Output is correct
15 Correct 143 ms 28560 KB Output is correct
16 Correct 144 ms 28484 KB Output is correct
17 Correct 150 ms 28356 KB Output is correct
18 Correct 144 ms 28564 KB Output is correct
19 Correct 143 ms 28540 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 4 ms 1100 KB Output is correct
23 Correct 142 ms 28432 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 2 ms 332 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 4 ms 588 KB Output is correct
27 Correct 10 ms 972 KB Output is correct
28 Correct 14 ms 1356 KB Output is correct
29 Correct 5 ms 692 KB Output is correct
30 Correct 9 ms 1088 KB Output is correct
31 Correct 13 ms 1484 KB Output is correct
32 Correct 6 ms 588 KB Output is correct
33 Correct 9 ms 1100 KB Output is correct
34 Correct 13 ms 1484 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 1 ms 332 KB Output is correct
38 Correct 1 ms 332 KB Output is correct
39 Correct 1 ms 332 KB Output is correct
40 Correct 1 ms 332 KB Output is correct
41 Correct 1 ms 332 KB Output is correct
42 Correct 1 ms 352 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 1 ms 332 KB Output is correct
45 Correct 1 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 2 ms 332 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 1 ms 332 KB Output is correct
50 Correct 2 ms 332 KB Output is correct
51 Correct 2 ms 332 KB Output is correct
52 Correct 1 ms 204 KB Output is correct
53 Correct 1 ms 204 KB Output is correct
54 Correct 20 ms 2492 KB Output is correct
55 Correct 20 ms 2508 KB Output is correct
56 Correct 13 ms 1356 KB Output is correct
57 Correct 6 ms 1212 KB Output is correct
58 Correct 19 ms 1868 KB Output is correct
59 Correct 19 ms 2128 KB Output is correct
60 Correct 9 ms 1300 KB Output is correct
61 Correct 7 ms 1204 KB Output is correct
62 Correct 19 ms 1888 KB Output is correct
63 Correct 19 ms 1932 KB Output is correct
64 Correct 6 ms 1064 KB Output is correct
65 Correct 11 ms 1356 KB Output is correct
66 Correct 20 ms 2224 KB Output is correct
67 Correct 18 ms 1900 KB Output is correct
68 Correct 12 ms 1352 KB Output is correct
69 Correct 12 ms 1368 KB Output is correct
70 Correct 8 ms 1228 KB Output is correct
71 Correct 12 ms 1228 KB Output is correct
72 Correct 20 ms 2124 KB Output is correct
73 Correct 21 ms 2200 KB Output is correct
74 Correct 15 ms 1464 KB Output is correct
75 Correct 15 ms 1484 KB Output is correct
76 Correct 23 ms 1944 KB Output is correct
77 Correct 19 ms 2124 KB Output is correct
78 Correct 8 ms 1228 KB Output is correct
79 Correct 9 ms 1228 KB Output is correct
80 Correct 4 ms 1100 KB Output is correct
81 Correct 4 ms 1100 KB Output is correct
82 Correct 15 ms 1412 KB Output is correct
83 Correct 15 ms 1420 KB Output is correct
84 Correct 9 ms 1488 KB Output is correct
85 Correct 7 ms 1100 KB Output is correct
86 Correct 13 ms 1756 KB Output is correct
87 Correct 18 ms 2124 KB Output is correct
88 Correct 11 ms 1320 KB Output is correct
89 Correct 14 ms 1332 KB Output is correct
90 Correct 9 ms 1228 KB Output is correct
91 Correct 8 ms 1248 KB Output is correct
92 Correct 12 ms 1484 KB Output is correct
93 Correct 11 ms 1540 KB Output is correct
94 Correct 14 ms 1508 KB Output is correct
95 Correct 17 ms 1680 KB Output is correct
96 Correct 15 ms 1640 KB Output is correct
97 Correct 17 ms 1612 KB Output is correct
98 Correct 16 ms 1708 KB Output is correct
99 Correct 24 ms 2136 KB Output is correct
100 Correct 18 ms 1868 KB Output is correct
101 Correct 21 ms 1840 KB Output is correct
102 Correct 1 ms 332 KB Output is correct
103 Correct 1 ms 300 KB Output is correct
104 Correct 1 ms 332 KB Output is correct
105 Correct 1 ms 332 KB Output is correct
106 Correct 1 ms 332 KB Output is correct
107 Correct 1 ms 304 KB Output is correct
108 Correct 1 ms 332 KB Output is correct
109 Correct 1 ms 332 KB Output is correct
110 Correct 1 ms 332 KB Output is correct
111 Correct 1 ms 332 KB Output is correct
112 Correct 3 ms 460 KB Output is correct
113 Correct 5 ms 688 KB Output is correct
114 Correct 6 ms 844 KB Output is correct

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1059 ms 60908 KB Time limit exceeded
2 Halted 0 ms 0 KB -