Submission #305744

#	Time	Username	Problem	Language	Result	Execution time	Memory
305744		sofapuden	Dreaming (IOI13_dreaming)	C++14	0 / 100	61 ms	15092 KiB

dreaming

#include "dreaming.h"
#include <bits/stdc++.h>
 
using namespace std;
vector<vector<pair<int,int>>> gri;
vector<int> dis = {0,0,0};
vector<int> dep;
vector<int> used;
int jic = 0;
int y;
 
int dfs(int x, int p){
	used[x] = 1;
	int s = 0;
	for(int i = 0; i < (int)gri[x].size(); ++i){
		int z = 0;
		if(gri[x][i].first != p)z = dfs(gri[x][i].first,x)+gri[x][i].second;
		dep.push_back(z);
		s+=z;
	}
	return s;
}
void find(int ind){
	if(!gri[ind].size()){dis.push_back(0);return;}
	dep.clear();
	y = dfs(ind,ind);
	jic = max(jic,y);
	int best = INT_MAX;
	for(int i = 0; i < (int)dep.size(); ++i){
		best = min(best, max(y-dep[i],dep[i]));
	}
	dis.push_back(best);	
}
 
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	used.resize(N,0);
	gri.resize(N);
	for(int i = 0; i < M; ++i){
		gri[A[i]].push_back({B[i],T[i]});
		gri[B[i]].push_back({A[i],T[i]});
	}
	for(int i = 0; i < N; ++i){
		if(!used[i] && gri[i].size() == 1){
			find(i);
		}
	}
	sort(dis.rbegin(),dis.rend());
	return max(jic,max(dis[0]+L+dis[1],dis[1]+2*L+dis[2]));
}

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