oj.uz

Submission #42498

# Submission time Handle Problem Language Result Execution time Memory
42498 2018-02-27T22:23:58 Z MatheusLealV Evacuation plan (IZhO18_plan) C++14
41 / 100
 4000 ms 37852 KB 
#include <bits/stdc++.h>
#define int long long
#define N 100005
#define inf 2000000000000000000LL
#define f first
#define s second
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;

int n, m, k, q, P[N], id[N], dist[N], rev[N], pai[N], peso[N];

vector<pii> grafo[N];

void dijkstra()
{
	priority_queue<pii, vector<pii>, greater<pii> > pq;

	for(int i = 1; i <= n; i++) dist[i] = inf;

	for(int i = 1; i <= k; i++) dist[ P[i] ] = 0, pq.push({0, P[i]});

	while(!pq.empty())
	{
		int x = pq.top().s, d = pq.top().f;

		pq.pop();

		if(d > dist[x]) continue;

		for(auto v: grafo[x])
		{
			if(dist[v.f] > dist[x] + v.s)
			{
				dist[v.f] = dist[x] + v.s;

				pq.push({dist[v.f], v.f});
			}
		}
	}

	vector<pii> v;

	for(int i = 1; i <= n; i++) v.push_back({dist[i], i});

	sort(v.begin(), v.end());

	for(int i = 0; i < v.size(); i++) id[ v[i].s ] = i + 1, rev[i + 1] = v[i].s;
}

int ok[N];

int Find(int x)
{
	if(x == pai[x]) return x;

	return pai[x] = Find(pai[x]);
}

void join(int a, int b)
{
	a = Find(a), b = Find(b);

	if(a == b) return;

	if(peso[a] > peso[b]) pai[b] = a;

	else if(peso[a] < peso[b]) pai[a] = b;

	else pai[a] = b, peso[b] ++;
}

int cor = 1;

int32_t main()
{
	ios::sync_with_stdio(false); cin.tie(0);

	cin>>n>>m;

	for(int i = 1, a, b, c; i <= m; i++)
	{
		cin>>a>>b>>c;

		grafo[a].push_back({b, c});

		grafo[b].push_back({a, c});
	}

	cin>>k;

	for(int i = 1; i <= k; i++) cin>>P[i];

	dijkstra();

	cin>>q;

	for(int t = 1, a, b; t <= q; t++)
	{
		cin>>a>>b;

		int ini = 1, fim = n, mid, best = -1;

		for(int x = 1; x <= n; x++) pai[x] = x, peso[x] = 0;

		for(int x = n; x >= 1; x--)
		{
			int xi = rev[x];

			for(auto v: grafo[xi])
			{
				if(id[v.f] > x)
				{
					join(v.f, xi);
				}
			}

			if(Find(a) == Find(b))
			{
				cout<< dist[ xi ] <<"\n";

				break;
			}
		}
	}
}

Compilation message

plan.cpp: In function 'void dijkstra()':
plan.cpp:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < v.size(); i++) id[ v[i].s ] = i + 1, rev[i + 1] = v[i].s;
                 ~~^~~~~~~~~~
plan.cpp: In function 'int32_t main()':
plan.cpp:102:7: warning: unused variable 'ini' [-Wunused-variable]
   int ini = 1, fim = n, mid, best = -1;
       ^~~
plan.cpp:102:16: warning: unused variable 'fim' [-Wunused-variable]
   int ini = 1, fim = n, mid, best = -1;
                ^~~
plan.cpp:102:25: warning: unused variable 'mid' [-Wunused-variable]
   int ini = 1, fim = n, mid, best = -1;
                         ^~~
plan.cpp:102:30: warning: unused variable 'best' [-Wunused-variable]
   int ini = 1, fim = n, mid, best = -1;
                              ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 15 ms 2808 KB Output is correct
3 Correct 16 ms 2936 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 16 ms 2808 KB Output is correct
6 Correct 12 ms 2936 KB Output is correct
7 Correct 4 ms 2684 KB Output is correct
8 Correct 4 ms 2780 KB Output is correct
9 Correct 16 ms 2936 KB Output is correct
10 Correct 21 ms 2808 KB Output is correct
11 Correct 19 ms 2808 KB Output is correct
12 Correct 15 ms 2808 KB Output is correct
13 Correct 20 ms 2808 KB Output is correct
14 Correct 15 ms 2808 KB Output is correct
15 Correct 19 ms 2936 KB Output is correct

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 15 ms 2808 KB Output is correct
3 Correct 16 ms 2936 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 16 ms 2808 KB Output is correct
6 Correct 12 ms 2936 KB Output is correct
7 Correct 4 ms 2684 KB Output is correct
8 Correct 4 ms 2780 KB Output is correct
9 Correct 16 ms 2936 KB Output is correct
10 Correct 21 ms 2808 KB Output is correct
11 Correct 19 ms 2808 KB Output is correct
12 Correct 15 ms 2808 KB Output is correct
13 Correct 20 ms 2808 KB Output is correct
14 Correct 15 ms 2808 KB Output is correct
15 Correct 19 ms 2936 KB Output is correct
16 Execution timed out 4096 ms 12224 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2672 KB Output is correct
2 Correct 4 ms 2780 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 4 ms 2684 KB Output is correct
5 Correct 4 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 4 ms 2764 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 4 ms 2808 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 210 ms 18408 KB Output is correct
2 Correct 484 ms 34412 KB Output is correct
3 Correct 468 ms 34296 KB Output is correct
4 Correct 103 ms 12220 KB Output is correct
5 Correct 508 ms 35868 KB Output is correct
6 Correct 487 ms 36072 KB Output is correct
7 Correct 494 ms 36272 KB Output is correct
8 Correct 478 ms 36136 KB Output is correct
9 Correct 470 ms 36176 KB Output is correct
10 Correct 488 ms 35972 KB Output is correct
11 Correct 485 ms 36140 KB Output is correct
12 Correct 471 ms 35748 KB Output is correct
13 Correct 470 ms 35796 KB Output is correct
14 Correct 477 ms 35868 KB Output is correct
15 Correct 526 ms 37852 KB Output is correct
16 Correct 493 ms 35588 KB Output is correct
17 Correct 462 ms 35828 KB Output is correct
18 Correct 475 ms 35828 KB Output is correct
19 Correct 87 ms 12260 KB Output is correct
20 Correct 481 ms 35736 KB Output is correct
21 Correct 451 ms 35816 KB Output is correct
22 Correct 122 ms 13532 KB Output is correct
23 Correct 112 ms 12372 KB Output is correct
24 Correct 125 ms 13552 KB Output is correct
25 Correct 116 ms 13660 KB Output is correct
26 Correct 120 ms 12696 KB Output is correct
27 Correct 96 ms 11704 KB Output is correct
28 Correct 116 ms 13092 KB Output is correct
29 Correct 103 ms 11576 KB Output is correct
30 Correct 116 ms 13180 KB Output is correct
31 Correct 94 ms 11748 KB Output is correct

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 15 ms 2808 KB Output is correct
3 Correct 16 ms 2936 KB Output is correct
4 Correct 4 ms 2680 KB Output is correct
5 Correct 16 ms 2808 KB Output is correct
6 Correct 12 ms 2936 KB Output is correct
7 Correct 4 ms 2684 KB Output is correct
8 Correct 4 ms 2780 KB Output is correct
9 Correct 16 ms 2936 KB Output is correct
10 Correct 21 ms 2808 KB Output is correct
11 Correct 19 ms 2808 KB Output is correct
12 Correct 15 ms 2808 KB Output is correct
13 Correct 20 ms 2808 KB Output is correct
14 Correct 15 ms 2808 KB Output is correct
15 Correct 19 ms 2936 KB Output is correct
16 Execution timed out 4096 ms 12224 KB Time limit exceeded
17 Halted 0 ms 0 KB -