oj.uz

Submission #125640

# Submission time Handle Problem Language Result Execution time Memory
125640 2019-07-06T06:52:08 Z nxteru Dreaming (IOI13_dreaming) C++14
18 / 100
 66 ms 12280 KB 
#include "dreaming.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
#define PB push_back
#define F first
#define S second
#define INF 1000000001
int n,m,dp[100005],l[100005],r[100005];
vector<P>g[100005];
bool vis[100005];
void dfs1(int v,int p){
	vis[v]=true;
	dp[v]=0;
	for(int i=0;i<g[v].size();i++){
		int u=g[v][i].F,c=g[v][i].S;
		if(u==p)continue;
		dfs1(u,v);
		dp[v]=max(dp[v],dp[u]+c);
	}
}
int dfs2(int v,int p,int x){
	for(int i=0;i<g[v].size();i++)l[i]=0,r[i]=0;
	for(int i=0;i<g[v].size();i++){
		int u=g[v][i].F,c=g[v][i].S;
		if(u==p){
			dp[v]=max(dp[v],x+c);
			l[i]=x+c,r[i]=x+c;
		}else l[i]=dp[u]+c,r[i]=dp[u]+c;
	}
	int res=dp[v];
	for(int i=1;i<g[v].size();i++)l[i]=max(l[i],l[i-1]);
	for(int i=g[v].size()-1;i>0;i--)r[i-1]=max(r[i-1],r[i]);
	for(int i=0;i<g[v].size();i++){
		int u=g[v][i].F;
		if(u==p)continue;
		int c=0;
		if(i>0)c=max(c,l[i-1]);
		if(i+1<g[v].size())c=max(c,r[i+1]);
		res=min(res,dfs2(u,v,c));
	}
	return res;
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	n=N,m=M;
	for(int i=0;i<m;i++){
		g[A[i]].PB(P(B[i],T[i]));
		g[B[i]].PB(P(A[i],T[i]));
	}
	vector<int>p;
	for(int i=0;i<n;i++){
		if(!vis[i]){
			dfs1(i,-1);
			p.PB(dfs2(i,-1,0));
		}
	}
	sort(p.begin(),p.end(),greater<int>());
	for(int i=1;i<p.size();i++)p[i]+=L;
	p.PB(0);
	sort(p.begin(),p.end(),greater<int>());
	return p[0]+p[1];
}

Compilation message

dreaming.cpp: In function 'void dfs1(int, int)':
dreaming.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[v].size();i++){
              ~^~~~~~~~~~~~
dreaming.cpp: In function 'int dfs2(int, int, int)':
dreaming.cpp:23:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[v].size();i++)l[i]=0,r[i]=0;
              ~^~~~~~~~~~~~
dreaming.cpp:24:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[v].size();i++){
              ~^~~~~~~~~~~~
dreaming.cpp:32:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<g[v].size();i++)l[i]=max(l[i],l[i-1]);
              ~^~~~~~~~~~~~
dreaming.cpp:34:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[v].size();i++){
              ~^~~~~~~~~~~~
dreaming.cpp:39:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(i+1<g[v].size())c=max(c,r[i+1]);
      ~~~^~~~~~~~~~~~
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:58:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<p.size();i++)p[i]+=L;
              ~^~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 66 ms 12280 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 66 ms 12280 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 66 ms 12280 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 32 ms 6324 KB Output is correct
2 Correct 31 ms 6264 KB Output is correct
3 Correct 33 ms 6264 KB Output is correct
4 Correct 31 ms 6264 KB Output is correct
5 Correct 32 ms 6280 KB Output is correct
6 Correct 33 ms 6776 KB Output is correct
7 Correct 32 ms 6484 KB Output is correct
8 Correct 31 ms 6264 KB Output is correct
9 Correct 32 ms 6264 KB Output is correct
10 Correct 32 ms 6392 KB Output is correct
11 Correct 4 ms 2652 KB Output is correct
12 Correct 10 ms 3824 KB Output is correct
13 Correct 9 ms 3956 KB Output is correct
14 Correct 9 ms 3828 KB Output is correct
15 Correct 9 ms 3832 KB Output is correct
16 Correct 9 ms 3828 KB Output is correct
17 Correct 9 ms 3828 KB Output is correct
18 Correct 10 ms 3832 KB Output is correct
19 Correct 9 ms 3828 KB Output is correct
20 Correct 4 ms 2684 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 4 ms 2808 KB Output is correct
23 Correct 9 ms 3828 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 66 ms 12280 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 66 ms 12280 KB Output isn't correct
2 Halted 0 ms 0 KB -