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답안 #133906

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
133906 2019-07-21T17:31:07 Z arthurconmy 꿈 (IOI13_dreaming) C++14
32 / 100
 74 ms 11768 KB 
#include <bits/stdc++.h>

#ifndef ARTHUR_LOCAL
	#include "dreaming.h"
#endif

using namespace std;
using pii=pair<int,int>;

#define ff first
#define ss second

const int MAXN = 100001;
vector<pii> adj[MAXN];
bool vis[MAXN];
int dis[MAXN];
pii antipode={-1,-1};
bool vis2[MAXN];
int dis2[MAXN];
pii antipode2={-1,-1};
bool vis3[MAXN];
int semi_diam = -1;

void dfs1(int v)
{
	vis[v]=1;

	for(auto u_raw:adj[v])
	{
		int u=u_raw.ff;
		int d=u_raw.ss;

		if(vis[u]) continue;
		dis[u]=dis[v]+d;
		antipode=max(antipode,{dis[u],u});
		dfs1(u);
	}
}

void dfs2(int v)
{
	vis2[v]=1;

	for(auto u_raw:adj[v])
	{
		int u=u_raw.ff;
		int d=u_raw.ss;

		if(vis2[u]) continue;
		dis2[u]=dis2[v]+d;
		antipode2=max(antipode2,{dis2[u],u});
		dfs2(u);
	}
}

void dfs3(int v)
{
	vis3[v]=1;

	for(auto u_raw:adj[v])
	{
		int u=u_raw.ff;
		int d=u_raw.ss;

		if(vis3[u]) continue;
		semi_diam = min(semi_diam,max(antipode2.ff-dis2[u],dis2[u]));
		dfs3(u);
	}
}

int travelTime(int n, int m, int l, int A[], int B[], int T[])
{
	vector<pii> di_sdi; // all the diameter, semi-diameter pairs

	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]));
	}

	for(int i=0; i<n; i++)
	{
		if(vis[i]) continue;

		dfs1(i);

		if(antipode == make_pair(-1,-1))
		{
			di_sdi.push_back({0,0});
			continue;
		}

		dfs2(antipode.ss);

		// cout << i << " " << antipode.ss << " " << antipode2.ss << " " << antipode2.ff << endl;

		semi_diam=int(1e9);
		dfs3(antipode.ss); // don't think that this need be from antipode2.ss

		di_sdi.push_back({semi_diam,antipode2.ff});

		antipode={-1,-1};
		antipode2={-1,-1};
	}

	// for(auto SD:di_sdi)
	// {
	// 	cout << SD.ff << " " << SD.ss << endl;
	// }

	sort(di_sdi.rbegin(),di_sdi.rend());

	int ans=0;

	for(auto SD:di_sdi) ans=max(ans,SD.ss);

	if(di_sdi.size()>=3) ans=max(ans,l+l+di_sdi[1].ff+di_sdi[2].ff);
	if(di_sdi.size()>=2) ans=max(ans,l+di_sdi[0].ff+di_sdi[1].ff);

	// cout << ans << endl;

	return ans;
}

Compilation message

dreaming.cpp: In function 'void dfs3(int)':
dreaming.cpp:63:7: warning: unused variable 'd' [-Wunused-variable]
   int d=u_raw.ss;
       ^

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 ms 11768 KB Output is correct
2 Correct 63 ms 11640 KB Output is correct
3 Correct 46 ms 8712 KB Output is correct
4 Correct 12 ms 4216 KB Output is correct
5 Correct 11 ms 3448 KB Output is correct
6 Correct 19 ms 4728 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 35 ms 6136 KB Output is correct
9 Correct 44 ms 7416 KB Output is correct
10 Correct 4 ms 2808 KB Output is correct
11 Correct 74 ms 9052 KB Output is correct
12 Correct 71 ms 10204 KB Output is correct
13 Correct 4 ms 2808 KB Output is correct

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 ms 11768 KB Output is correct
2 Correct 63 ms 11640 KB Output is correct
3 Correct 46 ms 8712 KB Output is correct
4 Correct 12 ms 4216 KB Output is correct
5 Correct 11 ms 3448 KB Output is correct
6 Correct 19 ms 4728 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 35 ms 6136 KB Output is correct
9 Correct 44 ms 7416 KB Output is correct
10 Correct 4 ms 2808 KB Output is correct
11 Correct 74 ms 9052 KB Output is correct
12 Correct 71 ms 10204 KB Output is correct
13 Correct 4 ms 2808 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Incorrect 4 ms 2680 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 ms 11768 KB Output is correct
2 Correct 63 ms 11640 KB Output is correct
3 Correct 46 ms 8712 KB Output is correct
4 Correct 12 ms 4216 KB Output is correct
5 Correct 11 ms 3448 KB Output is correct
6 Correct 19 ms 4728 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 35 ms 6136 KB Output is correct
9 Correct 44 ms 7416 KB Output is correct
10 Correct 4 ms 2808 KB Output is correct
11 Correct 74 ms 9052 KB Output is correct
12 Correct 71 ms 10204 KB Output is correct
13 Correct 4 ms 2808 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Incorrect 4 ms 2680 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 7028 KB Output is correct
2 Correct 35 ms 7232 KB Output is correct
3 Correct 32 ms 7024 KB Output is correct
4 Correct 34 ms 7156 KB Output is correct
5 Correct 34 ms 7056 KB Output is correct
6 Correct 36 ms 7796 KB Output is correct
7 Correct 36 ms 7284 KB Output is correct
8 Correct 34 ms 7028 KB Output is correct
9 Correct 31 ms 7020 KB Output is correct
10 Correct 34 ms 7280 KB Output is correct
11 Correct 4 ms 2680 KB Output is correct
12 Correct 10 ms 4720 KB Output is correct
13 Correct 10 ms 4848 KB Output is correct
14 Correct 10 ms 4720 KB Output is correct
15 Correct 10 ms 4892 KB Output is correct
16 Correct 12 ms 4720 KB Output is correct
17 Correct 11 ms 4332 KB Output is correct
18 Correct 11 ms 4848 KB Output is correct
19 Correct 10 ms 4724 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 4 ms 2808 KB Output is correct
23 Correct 10 ms 4716 KB Output is correct

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 ms 11768 KB Output is correct
2 Correct 63 ms 11640 KB Output is correct
3 Correct 46 ms 8712 KB Output is correct
4 Correct 12 ms 4216 KB Output is correct
5 Correct 11 ms 3448 KB Output is correct
6 Correct 19 ms 4728 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 35 ms 6136 KB Output is correct
9 Correct 44 ms 7416 KB Output is correct
10 Correct 4 ms 2808 KB Output is correct
11 Correct 74 ms 9052 KB Output is correct
12 Correct 71 ms 10204 KB Output is correct
13 Correct 4 ms 2808 KB Output is correct
14 Correct 5 ms 2936 KB Output is correct
15 Correct 6 ms 2808 KB Output is correct
16 Correct 6 ms 2936 KB Output is correct
17 Correct 5 ms 2808 KB Output is correct
18 Correct 5 ms 2808 KB Output is correct
19 Correct 5 ms 2936 KB Output is correct
20 Correct 4 ms 2808 KB Output is correct
21 Correct 5 ms 2808 KB Output is correct
22 Correct 5 ms 2936 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Incorrect 4 ms 2680 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 ms 11768 KB Output is correct
2 Correct 63 ms 11640 KB Output is correct
3 Correct 46 ms 8712 KB Output is correct
4 Correct 12 ms 4216 KB Output is correct
5 Correct 11 ms 3448 KB Output is correct
6 Correct 19 ms 4728 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 35 ms 6136 KB Output is correct
9 Correct 44 ms 7416 KB Output is correct
10 Correct 4 ms 2808 KB Output is correct
11 Correct 74 ms 9052 KB Output is correct
12 Correct 71 ms 10204 KB Output is correct
13 Correct 4 ms 2808 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Incorrect 4 ms 2680 KB Output isn't correct
17 Halted 0 ms 0 KB -