제출 #338143

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
338143		nandonathaniel	꿈 (IOI13_dreaming)	C++14	0 / 100	45 ms	11248 KiB

dreaming

#include "dreaming.h"
#include "bits/stdc++.h"
using namespace std;
typedef pair<int,int> pii;
const int MAXN=100005;

vector<pii> adj[MAXN];
vector<int> kel[MAXN];
int par[MAXN];

int find(int x){
	if(par[x]==x)return x;
	return par[x]=find(par[x]);
}

void join(int a,int b){
	par[find(a)]=find(b);
}

int jarak;

void dfs(int now,int par,int dist){
	jarak=max(jarak,dist);
	for(auto nxt : adj[now]){
		if(nxt.first==par)continue;
		dfs(nxt.first,now,dist+nxt.second);
	}
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	for(int i=1;i<=N;i++)par[i]=i;
	for(int i=0;i<M;i++){
		A[i]++;B[i]++;
		adj[A[i]].push_back({B[i],T[i]});
		adj[B[i]].push_back({A[i],T[i]});
		join(A[i],B[i]);
	}
	for(int i=1;i<=N;i++)kel[find(i)].push_back(i);
	vector<int> v;
	int ans=0;
	for(int i=1;i<=3;i++){
		//for every tree, find root s.t the distance between the root and the furthest leaf is minimum
		if(kel[i].empty())continue;
		jarak=0;
		dfs(kel[i][0],-1,0);
		int furthest=jarak,diameter=jarak;
		for(int j=1;j<(int)kel[i].size();j++){
			jarak=0;
			dfs(kel[i][j],-1,0);
			furthest=min(furthest,jarak);
			diameter=max(diameter,jarak);
		}
		v.push_back(furthest);
		ans=max(ans,diameter);
	}
	if(v.size()==2)ans=max(ans,v[0]+v[1]+L);
//	else assert(0);
	return ans;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 10
• Subtask 3: 0 / 23
• Subtask 4: 0 / 18
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23