oj.uz

Submission #17408

# Submission time Handle Problem Language Result Execution time Memory
17408 2015-11-27T22:30:40 Z comet Dreaming (IOI13_dreaming) C++
14 / 100
 60 ms 11000 KB 
#include "dreaming.h"
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
typedef pair<int,int> pp;
typedef vector<pp> vec;
typedef vector<vec> mat;
#define pb push_back

int N;
int subsz[100000],subsz2[100000];
int vi[100000],vi2[100000];
int Max,len[100000],ans;
bool chk[100000];
vec s;
mat path;

void dfs(int v){
	chk[v]=1;
	for(int i=0;i<path[v].size();i++){
		int u=path[v][i].first;
		int c=path[v][i].second;
		if(chk[u])continue;
		dfs(u);
		int t=subsz[u]+c;
		if(subsz[v]<t){
			subsz2[v]=subsz[v];vi2[v]=vi[v];
			subsz[v]=t;vi[v]=u;
		}else if(subsz2[v]<t){
			subsz2[v]=t;vi2[v]=u;
		}
	}
//	printf("%d : (%d,%d), (%d,%d)\n",v,subsz[v],vi[v],subsz2[v],vi2[v]);
}

void dfs2(int v,int h){
	Max=min(Max,max(h,max(subsz[v],subsz2[v])));
	ans=max(ans,max(h+subsz[v],subsz[v]+subsz2[v]));
	chk[v]=0;
	for(int i=0;i<path[v].size();i++){
		int u=path[v][i].first;
		int c=path[v][i].second;
		if(!chk[u])continue;
		if(u==vi[v]){
			dfs2(u,max(h,subsz2[v])+c);
		}else if(u==vi2[v]){
			dfs2(u,max(h,subsz[v])+c);
		}
	}
}

int travelTime(int N_, int M, int L, int A[], int B[], int T[]) {
	N=N_;
	path.assign(N+1,vec());
	for(int i=0;i<M;i++){
		path[A[i]].pb(pp(B[i],T[i]));
		path[B[i]].pb(pp(A[i],T[i]));
	}
	for(int i=0;i<N;i++){
		if(!chk[i]){
			dfs(i);
		}
	}

	for(int i=0;i<N;i++){
		if(chk[i]){
			Max=1e9;
			dfs2(i,0);
			len[i]=Max;
			s.pb(pp(len[i],i));
		}
	}

	sort(s.begin(),s.end());
/*
	for(int i=0;i<s.size();i++){
		printf("(%d,%d) ",s[i].first,s[i].second);
	}
*/
	if(s.size()==1)return max(ans,s[0].first);
	return max(ans,s[s.size()-1].first+s[s.size()-2].first+L);
}

Compilation message

dreaming.cpp: In function 'void dfs(int)':
dreaming.cpp:21:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<path[v].size();i++){
              ~^~~~~~~~~~~~~~~
dreaming.cpp: In function 'void dfs2(int, int)':
dreaming.cpp:41:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<path[v].size();i++){
              ~^~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 11000 KB Output is correct
2 Correct 57 ms 10872 KB Output is correct
3 Correct 41 ms 8572 KB Output is correct
4 Correct 9 ms 1920 KB Output is correct
5 Correct 8 ms 1408 KB Output is correct
6 Correct 14 ms 2688 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 28 ms 4864 KB Output is correct
9 Correct 37 ms 6904 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 49 ms 8312 KB Output is correct
12 Correct 60 ms 9588 KB Output is correct
13 Correct 2 ms 384 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 11000 KB Output is correct
2 Correct 57 ms 10872 KB Output is correct
3 Correct 41 ms 8572 KB Output is correct
4 Correct 9 ms 1920 KB Output is correct
5 Correct 8 ms 1408 KB Output is correct
6 Correct 14 ms 2688 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 28 ms 4864 KB Output is correct
9 Correct 37 ms 6904 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 49 ms 8312 KB Output is correct
12 Correct 60 ms 9588 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 2 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 2 ms 384 KB Output is correct
22 Correct 2 ms 384 KB Output is correct
23 Correct 2 ms 384 KB Output is correct
24 Correct 2 ms 384 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 2 ms 384 KB Output is correct
27 Correct 2 ms 384 KB Output is correct
28 Correct 2 ms 384 KB Output is correct
29 Correct 2 ms 384 KB Output is correct
30 Incorrect 2 ms 384 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 11000 KB Output is correct
2 Correct 57 ms 10872 KB Output is correct
3 Correct 41 ms 8572 KB Output is correct
4 Correct 9 ms 1920 KB Output is correct
5 Correct 8 ms 1408 KB Output is correct
6 Correct 14 ms 2688 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 28 ms 4864 KB Output is correct
9 Correct 37 ms 6904 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 49 ms 8312 KB Output is correct
12 Correct 60 ms 9588 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 2 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 2 ms 384 KB Output is correct
22 Correct 2 ms 384 KB Output is correct
23 Correct 2 ms 384 KB Output is correct
24 Correct 2 ms 384 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 2 ms 384 KB Output is correct
27 Correct 2 ms 384 KB Output is correct
28 Correct 2 ms 384 KB Output is correct
29 Correct 2 ms 384 KB Output is correct
30 Incorrect 2 ms 384 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 7420 KB Output is correct
2 Incorrect 36 ms 7392 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 11000 KB Output is correct
2 Correct 57 ms 10872 KB Output is correct
3 Correct 41 ms 8572 KB Output is correct
4 Correct 9 ms 1920 KB Output is correct
5 Correct 8 ms 1408 KB Output is correct
6 Correct 14 ms 2688 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 28 ms 4864 KB Output is correct
9 Correct 37 ms 6904 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 49 ms 8312 KB Output is correct
12 Correct 60 ms 9588 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 3 ms 512 KB Output is correct
16 Correct 4 ms 640 KB Output is correct
17 Correct 2 ms 512 KB Output is correct
18 Correct 3 ms 512 KB Output is correct
19 Correct 4 ms 640 KB Output is correct
20 Incorrect 2 ms 512 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 57 ms 11000 KB Output is correct
2 Correct 57 ms 10872 KB Output is correct
3 Correct 41 ms 8572 KB Output is correct
4 Correct 9 ms 1920 KB Output is correct
5 Correct 8 ms 1408 KB Output is correct
6 Correct 14 ms 2688 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 28 ms 4864 KB Output is correct
9 Correct 37 ms 6904 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 49 ms 8312 KB Output is correct
12 Correct 60 ms 9588 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 2 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 2 ms 384 KB Output is correct
22 Correct 2 ms 384 KB Output is correct
23 Correct 2 ms 384 KB Output is correct
24 Correct 2 ms 384 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 2 ms 384 KB Output is correct
27 Correct 2 ms 384 KB Output is correct
28 Correct 2 ms 384 KB Output is correct
29 Correct 2 ms 384 KB Output is correct
30 Incorrect 2 ms 384 KB Output isn't correct
31 Halted 0 ms 0 KB -