oj.uz

Submission #31782

# Submission time Handle Problem Language Result Execution time Memory
31782 2017-09-09T02:37:26 Z Diuven Dreaming (IOI13_dreaming) C++11
18 / 100
 74 ms 11768 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
using namespace std;
typedef struct {int to, cost;} edge;
vector<edge> G[100010];
vector<int> rad;
bool done[100010];
int N, M, L, tmp, sz[100010], u, D;
int dfs(int v){
	done[v]=true, sz[v]=1;
	for(auto& e:G[v])
		if(!done[e.to])	sz[v]+=dfs(e.to);
	return sz[v];
}
int findcen(int v){
	dfs(v);
	int now=v;
	bool iscen=false;
	while(!iscen){
		iscen=true;
		for(auto& e:G[now])
			if(sz[now]>sz[e.to]&&sz[e.to]>sz[v]/2){
				iscen=false, now=e.to;
				break;
			}
	}
	return now;
}
void find(int v, int p=-1, int d=0){
	if(tmp<=d)	tmp=d, u=v;
	for(auto& e:G[v])
		if(e.to!=p)	find(e.to, v, d+e.cost);
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]){
	for(int i=1; i<=M; i++){
		G[A[i]+1].push_back({B[i]+1, T[i]});
		G[B[i]+1].push_back({A[i]+1, T[i]});
	}
	for(int i=1; i<=N; i++)
		if(!done[i]){
			int c=findcen(i);
			tmp=0, find(c), rad.push_back(tmp);
			tmp=0, find(u), D=max(D, tmp);
		}
	sort(rad.begin(), rad.end(), greater<int>());
	if(rad.size()>1U)	D=max(D, rad[0]+rad[1]+L);
	if(rad.size()>2U)	D=max(D, rad[1]+rad[2]+2*L);
	return D;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 74 ms 11768 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 74 ms 11768 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 74 ms 11768 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 5888 KB Output is correct
2 Correct 25 ms 5888 KB Output is correct
3 Correct 34 ms 5884 KB Output is correct
4 Correct 32 ms 5888 KB Output is correct
5 Correct 30 ms 5908 KB Output is correct
6 Correct 37 ms 6272 KB Output is correct
7 Correct 31 ms 6008 KB Output is correct
8 Correct 28 ms 6016 KB Output is correct
9 Correct 25 ms 5760 KB Output is correct
10 Correct 38 ms 6008 KB Output is correct
11 Correct 4 ms 2688 KB Output is correct
12 Correct 7 ms 3836 KB Output is correct
13 Correct 8 ms 3836 KB Output is correct
14 Correct 7 ms 3836 KB Output is correct
15 Correct 7 ms 3836 KB Output is correct
16 Correct 7 ms 3836 KB Output is correct
17 Correct 8 ms 3836 KB Output is correct
18 Correct 8 ms 3964 KB Output is correct
19 Correct 7 ms 3808 KB Output is correct
20 Correct 4 ms 2688 KB Output is correct
21 Correct 4 ms 2688 KB Output is correct
22 Correct 4 ms 2816 KB Output is correct
23 Correct 7 ms 3836 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 74 ms 11768 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 74 ms 11768 KB Output isn't correct
2 Halted 0 ms 0 KB -