oj.uz

답안 #468326

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
468326 2021-08-27T16:00:00 Z jazzup 꿈 (IOI13_dreaming) C++14
32 / 100
 74 ms 16280 KB 
#include "dreaming.h"
#include <queue>
#include <vector>
#include <utility>
#include <algorithm>
#include <cmath>

using namespace std;

int dis1[100010],dis2[100010];
bool visited[100010];
vector<pair<int,int> > v[100010],pb;
vector<int> pa,nl,len;
queue<int> q;

void dfs(pair<int,int> n){
	visited[n.first]=true;
	nl.push_back(n.first);

	if(dis2[n.first]==n.second){
		double targ=n.second/2.0;
		double dd=targ;
		int pu;
		for(int i=0;i<nl.size();i++){
			double diff=abs((double)dis2[nl[i]]-targ);
			if(diff<=dd){
				dd=diff;
				pu=max(dis2[nl[i]],n.second-dis2[nl[i]]);
			}
		}
		len.push_back(pu);
	}

	for(int i=0;i<v[n.first].size();i++){
		if(!visited[v[n.first][i].first]){
			dis2[v[n.first][i].first]=dis2[n.first]+v[n.first][i].second;
			dfs(make_pair(v[n.first][i].first,n.second));
		}
	}
	nl.pop_back();
}

int travelTime(int n, int m, int l, int a[], int b[], int t[]){
	for(int i=0;i<n;i++){
		dis1[i]=-1;
	}

	for(int i=0;i<m;i++){
		v[a[i]].push_back(make_pair(b[i],t[i]));
		v[b[i]].push_back(make_pair(a[i],t[i]));
	}

	for(int i=0;i<n;i++){
		if(dis1[i]==-1){
			dis1[i]=0;
			q.push(i);
			visited[i]=true;	

			int mxd=0,nd=i;

			while(!q.empty()){
				int cur=q.front();
				if(dis1[cur]>mxd){
					mxd=dis1[cur];
					nd=cur;
				}
				q.pop();
				for(int i=0;i<v[cur].size();i++){
					if(!visited[v[cur][i].first]){
						q.push(v[cur][i].first);
						dis1[v[cur][i].first]=dis1[cur]+v[cur][i].second;
						visited[v[cur][i].first]=true;
					}
				}
			}
			pa.push_back(nd);
		}
	}

	for(int i=0;i<n;i++){
		dis1[i]=-1;
		visited[i]=false;
	}

	for(int i=0;i<pa.size();i++){
		dis1[pa[i]]=0;
		q.push(pa[i]);
		visited[pa[i]]=true;	

		int mxd=0,nd=i;

		while(!q.empty()){
			int cur=q.front();
			if(dis1[cur]>mxd){
				mxd=dis1[cur];
				nd=cur;
			}
			q.pop();
			for(int i=0;i<v[cur].size();i++){
				if(!visited[v[cur][i].first]){
					q.push(v[cur][i].first);
					dis1[v[cur][i].first]=dis1[cur]+v[cur][i].second;
					visited[v[cur][i].first]=true;
				}
			}
		}
		pb.push_back(make_pair(nd,mxd));
	}

	for(int i=0;i<n;i++){
		dis2[i]=-1;
		visited[i]=false;
	}

	for(int i=0;i<pb.size();i++){
		dis2[pb[i].first]=0;
		dfs(pb[i]);
	}

	sort(len.begin(),len.end());

	int ml=-1;

	for(int i=0;i<n;i++){
		if(dis2[i]>ml){
			ml=dis2[i];
		}
	}

	int yo=len.size();

	int ans=-1;

	if(yo>=3){
		ans=max(len[yo-1]+len[yo-2]+l,len[yo-3]+len[yo-2]+2*l);
	}

	else if(yo==2){
		ans=len[yo-1]+len[yo-2]+l;
	}

	ans=max(ans,ml);

    return ans;
}

Compilation message

dreaming.cpp: In function 'void dfs(std::pair<int, int>)':
dreaming.cpp:24:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   for(int i=0;i<nl.size();i++){
      |               ~^~~~~~~~~~
dreaming.cpp:34:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |  for(int i=0;i<v[n.first].size();i++){
      |              ~^~~~~~~~~~~~~~~~~~
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:68:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for(int i=0;i<v[cur].size();i++){
      |                 ~^~~~~~~~~~~~~~
dreaming.cpp:85:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |  for(int i=0;i<pa.size();i++){
      |              ~^~~~~~~~~~
dreaming.cpp:99:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |    for(int i=0;i<v[cur].size();i++){
      |                ~^~~~~~~~~~~~~~
dreaming.cpp:115:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  115 |  for(int i=0;i<pb.size();i++){
      |              ~^~~~~~~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 56 ms 16204 KB Output is correct
2 Correct 74 ms 16280 KB Output is correct
3 Correct 47 ms 11608 KB Output is correct
4 Correct 10 ms 4704 KB Output is correct
5 Correct 8 ms 3660 KB Output is correct
6 Correct 15 ms 5708 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 28 ms 7236 KB Output is correct
9 Correct 36 ms 9268 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 71 ms 11344 KB Output is correct
12 Correct 64 ms 13580 KB Output is correct
13 Correct 2 ms 2772 KB Output is correct

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Correct 2 ms 2636 KB Output is correct
16 Correct 2 ms 2636 KB Output is correct
17 Correct 2 ms 2636 KB Output is correct
18 Correct 2 ms 2636 KB Output is correct
19 Correct 2 ms 2636 KB Output is correct
20 Correct 2 ms 2636 KB Output is correct
21 Incorrect 2 ms 2636 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 56 ms 16204 KB Output is correct
2 Correct 74 ms 16280 KB Output is correct
3 Correct 47 ms 11608 KB Output is correct
4 Correct 10 ms 4704 KB Output is correct
5 Correct 8 ms 3660 KB Output is correct
6 Correct 15 ms 5708 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 28 ms 7236 KB Output is correct
9 Correct 36 ms 9268 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 71 ms 11344 KB Output is correct
12 Correct 64 ms 13580 KB Output is correct
13 Correct 2 ms 2772 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Correct 2 ms 2636 KB Output is correct
16 Correct 2 ms 2636 KB Output is correct
17 Correct 2 ms 2636 KB Output is correct
18 Correct 2 ms 2636 KB Output is correct
19 Correct 2 ms 2636 KB Output is correct
20 Correct 2 ms 2636 KB Output is correct
21 Correct 2 ms 2636 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 2 ms 2636 KB Output is correct
24 Correct 2 ms 2636 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2636 KB Output is correct
27 Correct 2 ms 2636 KB Output is correct
28 Correct 2 ms 2636 KB Output is correct
29 Correct 2 ms 2636 KB Output is correct
30 Correct 2 ms 2636 KB Output is correct
31 Correct 2 ms 2636 KB Output is correct
32 Correct 2 ms 2636 KB Output is correct
33 Correct 2 ms 2636 KB Output is correct
34 Incorrect 2 ms 2636 KB Output isn't correct
35 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 7352 KB Output is correct
2 Correct 37 ms 7484 KB Output is correct
3 Correct 47 ms 7372 KB Output is correct
4 Correct 33 ms 7384 KB Output is correct
5 Correct 31 ms 7356 KB Output is correct
6 Correct 33 ms 7880 KB Output is correct
7 Correct 34 ms 7648 KB Output is correct
8 Correct 37 ms 7316 KB Output is correct
9 Correct 39 ms 7312 KB Output is correct
10 Correct 36 ms 7492 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 11 ms 5652 KB Output is correct
13 Correct 11 ms 5648 KB Output is correct
14 Correct 11 ms 5568 KB Output is correct
15 Correct 11 ms 5568 KB Output is correct
16 Correct 11 ms 5564 KB Output is correct
17 Correct 11 ms 5592 KB Output is correct
18 Correct 12 ms 5676 KB Output is correct
19 Correct 11 ms 5632 KB Output is correct
20 Correct 2 ms 2636 KB Output is correct
21 Correct 2 ms 2636 KB Output is correct
22 Correct 2 ms 2764 KB Output is correct
23 Correct 11 ms 5568 KB Output is correct

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Correct 2 ms 2636 KB Output is correct
16 Correct 2 ms 2636 KB Output is correct
17 Correct 2 ms 2636 KB Output is correct
18 Correct 2 ms 2636 KB Output is correct
19 Correct 2 ms 2636 KB Output is correct
20 Correct 2 ms 2636 KB Output is correct
21 Incorrect 2 ms 2636 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 56 ms 16204 KB Output is correct
2 Correct 74 ms 16280 KB Output is correct
3 Correct 47 ms 11608 KB Output is correct
4 Correct 10 ms 4704 KB Output is correct
5 Correct 8 ms 3660 KB Output is correct
6 Correct 15 ms 5708 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 28 ms 7236 KB Output is correct
9 Correct 36 ms 9268 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 71 ms 11344 KB Output is correct
12 Correct 64 ms 13580 KB Output is correct
13 Correct 2 ms 2772 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Correct 2 ms 2636 KB Output is correct
16 Correct 2 ms 2636 KB Output is correct
17 Correct 2 ms 2636 KB Output is correct
18 Correct 2 ms 2636 KB Output is correct
19 Correct 2 ms 2636 KB Output is correct
20 Correct 2 ms 2636 KB Output is correct
21 Correct 2 ms 2636 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 2 ms 2636 KB Output is correct
24 Correct 2 ms 2636 KB Output is correct
25 Correct 2 ms 2636 KB Output is correct
26 Correct 2 ms 2636 KB Output is correct
27 Correct 2 ms 2636 KB Output is correct
28 Correct 2 ms 2636 KB Output is correct
29 Correct 2 ms 2636 KB Output is correct
30 Correct 2 ms 2636 KB Output is correct
31 Correct 2 ms 2636 KB Output is correct
32 Correct 2 ms 2636 KB Output is correct
33 Correct 2 ms 2636 KB Output is correct
34 Incorrect 2 ms 2636 KB Output isn't correct
35 Halted 0 ms 0 KB -