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Submission #64352

# Submission time Handle Problem Language Result Execution time Memory
64352 2018-08-04T07:10:36 Z theknife2001 Dreaming (IOI13_dreaming) C++17
0 / 100
 64 ms 10616 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
#define ii pair< int , int >
#define se second
#define fi first

using namespace std;
const int N=1e5+55;
vector < ii > vec[N];
bool visited[N];
int root;
int d;
int l=1e9+5000;

int dfs(int u , int p ,bool q)
{
//    cout<<u<<' '<<p<<endl;
    visited[u]=1;
    int d1=0,d2=0;
    int v,c;
    int temp=0;
    for(auto x:vec[u])
    {
        v=x.fi;
        c=x.se;
        if(v==p)
            continue;
        temp=dfs(v,u,q);
        temp+=c;
        if(temp>d2)
            d2=temp;
        if(d2>d1)
            swap(d1,d2);
    }
    if(!q&&d<d1+d2)
    {
        root=u;
        d=d1+d2;
    }
    if(q)
    {
        if(l>max(d1,d-d1))
            l=max(d1,d-d1);
    }
//    cout<<u<<' '<<d1<<' '<<d2<<' '<<l<<endl;
    return d1;
}

int travelTime(int N, int M, int L, int A[], int B[], int T[])
{
    for(int i=0;i<N;i++)
    {
        vec[B[i]].push_back({A[i],T[i]});
        vec[A[i]].push_back({B[i],T[i]});
    }
    int l1=-1,l2;
    for(int i=0;i<N;i++)
    {
        if(visited[i]==0)
        {
            if(l1==-1)
            {
                dfs(i,0,0);
                l=1e9+5555;
                dfs(i,0,1);
                l1=l;
            }
            else
            {
                d=0;
                dfs(i,0,0);
                l=1e9+5000;
                dfs(i,0,1);
                l2=l;
            }
        }
    }
    return l1+l2+L;
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:79:14: warning: 'l2' may be used uninitialized in this function [-Wmaybe-uninitialized]
     return l1+l2+L;
            ~~^~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 64 ms 10616 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 64 ms 10616 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 64 ms 10616 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 29 ms 6264 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 64 ms 10616 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 64 ms 10616 KB Output isn't correct
2 Halted 0 ms 0 KB -