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Submission #587964

# Submission time Handle Problem Language Result Execution time Memory
587964 2022-07-02T15:13:13 Z MrDeboo Dreaming (IOI13_dreaming) C++17
32 / 100
 180 ms 19836 KB 
#include "dreaming.h"
#include <bits/stdc++.h>
using namespace std;
vector<pair<int,int>>vct[100000];
vector<pair<int,int>>vec[100000];
int fath[100000];
int val[100000];
int n,m,l,f,ans;
int diam(int in){
	deque<pair<int,int>>dq={{in,0}};
	map<int,bool>vis;
	vis[in]=1;
	int x=0,y=0;
	while(dq.size()){
		int a=dq.front().first,b=dq.front().second;
		dq.pop_front();
		if(b>=y){
			x=a;
			y=b;
		}
		for(auto &i:vct[a]){
			if(!vis[i.first]){
				vis[i.first]=1;
				dq.push_back({i.first,b+i.second});
			}
		}
	}
	dq.push_back({x,0});
	x=0;y=0;
	vis.clear();
    vis[dq.back().first]=1;
	while(dq.size()){
		int a=dq.front().first,b=dq.front().second;
		dq.pop_front();
		if(b>=y){
			x=a;
			y=b;
		}
		for(auto &i:vct[a]){
            if(!vis[i.first]){
				vis[i.first]=1;
				dq.push_back({i.first,b+i.second});
			}
		}
	}
	return y;
}
int dfs1(int in){
	for(auto &i:vec[in])val[in]=max(val[in],dfs1(i.first)+i.second);
	return val[in];
}
void dfs2(int in,int x){
	f=min(f,max(x,val[in]));
	for(auto &i:vec[in])dfs2(i.first,x+i.second);
}
int travelTime(int N, int M, int L, int a[], int b[], int t[]){
	n=N,m=M,l=L;
    for(int i=0;i<m;i++){
        vct[a[i]].push_back({b[i],t[i]});
        vct[b[i]].push_back({a[i],t[i]});
    }
    vector<int>vis(n);
    deque<int>v;
    for(int i=0;i<n;i++){
        if(vis[i])continue;
        vis[i]=1;
        vector<int>vc={i};
        {
            deque<int>dq={i};
            while(dq.size()){
                int a=dq.front();
                dq.pop_front();
                for(auto &w:vct[a]){
                    if(!vis[w.first]){
                        vis[w.first]=1;
						vec[a].push_back(w);
						fath[w.first]=a;
                        dq.push_back(w.first);
                        vc.push_back(w.first);
                    }
                }
            }
        }
        f=INT_MAX;
		ans=max(ans,diam(i));
		if(vc.size()==1)f=0;
		else{
			dfs1(i);
			f=min(f,val[i]);
			vector<pair<int,int>>V={{0,-1}};
			for(auto &w:vec[i])V.push_back({w.second+val[w.first],w.first});
			sort(V.begin(),V.end());
			for(auto &w:vec[i]){
				if(w.first==V.back().second)dfs2(w.first,V[V.size()-2].first+w.second);
				else dfs2(w.first,V.back().first+w.second);
			}
		}
        v.push_back(f);
    }
    sort(v.begin(),v.end());
    while(v.size()>1){
        ans=max(ans,v[v.size()-2]+l+v.back());
        break;
    }
    if(v.size()>2)ans=max(ans,v[v.size()-2]+v[v.size()-3]+l*2);
    return ans;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 172 ms 19836 KB Output is correct
2 Correct 180 ms 19556 KB Output is correct
3 Correct 99 ms 15616 KB Output is correct
4 Correct 19 ms 7156 KB Output is correct
5 Correct 14 ms 6184 KB Output is correct
6 Correct 32 ms 8200 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 64 ms 10544 KB Output is correct
9 Correct 80 ms 12840 KB Output is correct
10 Correct 3 ms 5076 KB Output is correct
11 Correct 136 ms 14260 KB Output is correct
12 Correct 155 ms 17040 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Incorrect 3 ms 4948 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 172 ms 19836 KB Output is correct
2 Correct 180 ms 19556 KB Output is correct
3 Correct 99 ms 15616 KB Output is correct
4 Correct 19 ms 7156 KB Output is correct
5 Correct 14 ms 6184 KB Output is correct
6 Correct 32 ms 8200 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 64 ms 10544 KB Output is correct
9 Correct 80 ms 12840 KB Output is correct
10 Correct 3 ms 5076 KB Output is correct
11 Correct 136 ms 14260 KB Output is correct
12 Correct 155 ms 17040 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Incorrect 3 ms 4948 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 52 ms 9604 KB Output is correct
2 Correct 48 ms 9660 KB Output is correct
3 Correct 42 ms 9676 KB Output is correct
4 Correct 62 ms 9604 KB Output is correct
5 Correct 49 ms 9656 KB Output is correct
6 Correct 59 ms 9936 KB Output is correct
7 Correct 48 ms 9760 KB Output is correct
8 Correct 53 ms 9472 KB Output is correct
9 Correct 39 ms 9560 KB Output is correct
10 Correct 45 ms 9720 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 32 ms 6512 KB Output is correct
13 Correct 27 ms 6468 KB Output is correct
14 Correct 26 ms 6484 KB Output is correct
15 Correct 32 ms 6488 KB Output is correct
16 Correct 25 ms 6512 KB Output is correct
17 Correct 35 ms 5972 KB Output is correct
18 Correct 25 ms 6624 KB Output is correct
19 Correct 27 ms 6440 KB Output is correct
20 Correct 3 ms 4920 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 25 ms 6388 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Incorrect 3 ms 4948 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 172 ms 19836 KB Output is correct
2 Correct 180 ms 19556 KB Output is correct
3 Correct 99 ms 15616 KB Output is correct
4 Correct 19 ms 7156 KB Output is correct
5 Correct 14 ms 6184 KB Output is correct
6 Correct 32 ms 8200 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 64 ms 10544 KB Output is correct
9 Correct 80 ms 12840 KB Output is correct
10 Correct 3 ms 5076 KB Output is correct
11 Correct 136 ms 14260 KB Output is correct
12 Correct 155 ms 17040 KB Output is correct
13 Correct 3 ms 5076 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Incorrect 3 ms 4948 KB Output isn't correct
17 Halted 0 ms 0 KB -