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Submission #897419

# Submission time Handle Problem Language Result Execution time Memory
897419 2024-01-03T04:44:46 Z Muhammad_Aneeq Dreaming (IOI13_dreaming) C++17
32 / 100
 56 ms 15820 KB 
#include <vector>
#include <algorithm>
#include <queue>
#include "dreaming.h"
using namespace std;
int const N=1e5+10;
vector<pair<int,int>>nei[N]={};
vector<int>heads;
int vis[N]={};
int cost[N]={};
void dfs(int n)
{
	vis[n]=1;
	for (auto [i,w]:nei[n])
	{
		if (!vis[i])
		{
			cost[n]+=w;
			dfs(i);
			cost[n]+=cost[i];
		}
	}
}
vector<pair<int,int>>cur={};
bool w1=0;
void getroot(int n,int pa,int root)
{
	int f=cost[root]-cost[n];
	for (auto [i,w]:nei[n])
	{
		if (i!=pa)
		{
			f=max(f,cost[i]+w);
			getroot(i,n,root);
		}
		else
			f=max(f,cost[root]-cost[n]);
	}
	cur.push_back({f,n});
}
void bfs(int n)
{
	queue<pair<int,int>>Q;
	Q.push({n,-1});
	while (Q.size())
	{
		int n,m;
		tie(n,m)=Q.front();
		Q.pop();
		for (auto [i,w]:nei[n])
		{
			if (i!=m)
			{
				cost[i]=cost[n]+w;
				Q.push({i,n});
			}
		}
	}
}
int travelTime(int n, int m, int l, int a[], int b[], int t[])
{
	int f=0;
	for (int i=0;i<m;i++)
	{
		f+=t[i];
		nei[a[i]].push_back({b[i],t[i]});
		nei[b[i]].push_back({a[i],t[i]});
	}
	for (int i=0;i<n;i++)
	{
		if (!vis[i])
		{
			heads.push_back(i);
			dfs(i);
		}
	}
	for (int i=0;i<n;i++)
		vis[i]={};
	vector<pair<int,int>>new_head;
	for (auto i:heads)
	{
		getroot(i,-1,i);
		sort(begin(cur),end(cur));
		new_head.push_back(cur[0]);
		cur={};
	}
	sort(begin(new_head),end(new_head));
	reverse(begin(new_head),end(new_head));
	for (int i=1;i<new_head.size();i++)
	{
		nei[new_head[0].second].push_back({new_head[i].second,l});
		nei[new_head[i].second].push_back({new_head[0].second,l});
		f+=l;
	}
	for (int i=0;i<n;i++)
		cost[i]=0;
	bfs(0);
	w1=0;
	new_head={};
	for (int i=0;i<n;i++)
	{
		new_head.push_back({cost[i],i});
		cost[i]=0;
	}
	sort(begin(new_head),end(new_head));
	reverse(begin(new_head),end(new_head));
	w1=1;
	bfs(new_head[0].second);
	new_head={};
	for (int i=0;i<n;i++)
	{
		new_head.push_back({cost[i],i});
		cost[i]=0;
	}
	sort(begin(new_head),end(new_head));
	reverse(begin(new_head),end(new_head));
	return new_head[0].first;
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:89:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |  for (int i=1;i<new_head.size();i++)
      |               ~^~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 15820 KB Output is correct
2 Correct 55 ms 15564 KB Output is correct
3 Correct 38 ms 13780 KB Output is correct
4 Correct 8 ms 5468 KB Output is correct
5 Correct 6 ms 4700 KB Output is correct
6 Correct 18 ms 6652 KB Output is correct
7 Correct 1 ms 3676 KB Output is correct
8 Correct 27 ms 8792 KB Output is correct
9 Correct 35 ms 11628 KB Output is correct
10 Correct 1 ms 3676 KB Output is correct
11 Correct 48 ms 12432 KB Output is correct
12 Correct 52 ms 14368 KB Output is correct
13 Correct 2 ms 3724 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3676 KB Output is correct
2 Correct 1 ms 3676 KB Output is correct
3 Incorrect 1 ms 3676 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 15820 KB Output is correct
2 Correct 55 ms 15564 KB Output is correct
3 Correct 38 ms 13780 KB Output is correct
4 Correct 8 ms 5468 KB Output is correct
5 Correct 6 ms 4700 KB Output is correct
6 Correct 18 ms 6652 KB Output is correct
7 Correct 1 ms 3676 KB Output is correct
8 Correct 27 ms 8792 KB Output is correct
9 Correct 35 ms 11628 KB Output is correct
10 Correct 1 ms 3676 KB Output is correct
11 Correct 48 ms 12432 KB Output is correct
12 Correct 52 ms 14368 KB Output is correct
13 Correct 2 ms 3724 KB Output is correct
14 Correct 1 ms 3676 KB Output is correct
15 Correct 1 ms 3676 KB Output is correct
16 Incorrect 1 ms 3676 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 9572 KB Output is correct
2 Correct 36 ms 9720 KB Output is correct
3 Correct 35 ms 9472 KB Output is correct
4 Correct 36 ms 9720 KB Output is correct
5 Correct 36 ms 9472 KB Output is correct
6 Correct 39 ms 9564 KB Output is correct
7 Correct 37 ms 9932 KB Output is correct
8 Correct 35 ms 9508 KB Output is correct
9 Correct 35 ms 9500 KB Output is correct
10 Correct 36 ms 9700 KB Output is correct
11 Correct 1 ms 3672 KB Output is correct
12 Correct 35 ms 9552 KB Output is correct
13 Correct 34 ms 9556 KB Output is correct
14 Correct 36 ms 9556 KB Output is correct
15 Correct 38 ms 9668 KB Output is correct
16 Correct 35 ms 9424 KB Output is correct
17 Correct 33 ms 9552 KB Output is correct
18 Correct 34 ms 9556 KB Output is correct
19 Correct 36 ms 9552 KB Output is correct
20 Correct 1 ms 3676 KB Output is correct
21 Correct 1 ms 3676 KB Output is correct
22 Correct 2 ms 3676 KB Output is correct
23 Correct 34 ms 9640 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3676 KB Output is correct
2 Correct 1 ms 3676 KB Output is correct
3 Incorrect 1 ms 3676 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 15820 KB Output is correct
2 Correct 55 ms 15564 KB Output is correct
3 Correct 38 ms 13780 KB Output is correct
4 Correct 8 ms 5468 KB Output is correct
5 Correct 6 ms 4700 KB Output is correct
6 Correct 18 ms 6652 KB Output is correct
7 Correct 1 ms 3676 KB Output is correct
8 Correct 27 ms 8792 KB Output is correct
9 Correct 35 ms 11628 KB Output is correct
10 Correct 1 ms 3676 KB Output is correct
11 Correct 48 ms 12432 KB Output is correct
12 Correct 52 ms 14368 KB Output is correct
13 Correct 2 ms 3724 KB Output is correct
14 Correct 1 ms 3676 KB Output is correct
15 Correct 1 ms 3676 KB Output is correct
16 Incorrect 1 ms 3676 KB Output isn't correct
17 Halted 0 ms 0 KB -