oj.uz

Submission #840552

# Submission time Handle Problem Language Result Execution time Memory
840552 2023-08-31T13:44:26 Z Mularstyle Dreaming (IOI13_dreaming) C++14
0 / 100
 36 ms 14104 KB 
#include "dreaming.h"
#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define f first
#define s second
#define pb push_back
vector<pii> V[100008];
vector<int> grp[100008];
bool vis1[100008];
bool vis2[100008];
int mxdis[100008];
void ddfs(int prev,int cur,int dis)
{
    mxdis[cur]=max(mxdis[cur],dis);
    for(auto [w,v]:V[cur])
    {
        if(v!=prev)
        {
             ddfs(cur,v,dis+w);
        }
    }
}
void gdfs(int prev,int cur,int g)
{
    vis1[cur]=true;
    grp[g].pb(cur);
    for(auto [w,v]:V[cur])
    {
        if(v!=prev)
        gdfs(cur,v,g);
    }
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {

    int u,v,w;
    for(int i=0;i<M;i++)
    {
        u=A[i];
        v=B[i];
        w=T[i];
        V[u].pb({w,v});
        V[v].pb({w,u});
    }
    for(int i=0;i<N;i++)
    {
        if(vis1[i])continue;
        gdfs(-1,i,i);
    }
    int mx1=-8,mx2=-8,mx3=-8,ans=0;
    for(int i=0;i<N;i++)
    {
        if(grp[i].empty())continue;
        int prev=N;
        for(int k=0;k<grp[i].size();k++)
        {
            int cur=N;
            for(auto v:grp[i])
            {
                if(!vis2[v]&&mxdis[v]>=mxdis[prev]&&mxdis[v]>=mxdis[cur])
                    cur=v;
            }
            if(cur==N)/// <3
                break;
            ddfs(N,cur,0);
            vis2[cur]=true;
            prev=cur;
        }
        int mn=INT_MAX;//shortest from longest
        for(auto v:grp[i])
        {
            mn=min(mxdis[v],mn);
            ans=max(ans,mxdis[v]);
        }
        if(mn>=mx1)
            mx3=mx2,mx2=mx1,mx1=mn;
        else if(mn>=mx2)
            mx3=mx2,mx2=mn;
        else if(mn>=mx3)
            mx3=mn;
    }
    ans=max({ans,mx1+mx2+L,mx2+mx3+2*L});
    return ans;
}

Compilation message

dreaming.cpp: In function 'void ddfs(int, int, int)':
dreaming.cpp:16:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   16 |     for(auto [w,v]:V[cur])
      |              ^
dreaming.cpp: In function 'void gdfs(int, int, int)':
dreaming.cpp:28:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   28 |     for(auto [w,v]:V[cur])
      |              ^
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:56:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         for(int k=0;k<grp[i].size();k++)
      |                     ~^~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 14104 KB Output is correct
2 Correct 33 ms 14072 KB Output is correct
3 Correct 23 ms 11456 KB Output is correct
4 Correct 6 ms 6356 KB Output is correct
5 Correct 6 ms 5716 KB Output is correct
6 Correct 10 ms 7108 KB Output is correct
7 Incorrect 3 ms 4948 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Incorrect 2 ms 5004 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 14104 KB Output is correct
2 Correct 33 ms 14072 KB Output is correct
3 Correct 23 ms 11456 KB Output is correct
4 Correct 6 ms 6356 KB Output is correct
5 Correct 6 ms 5716 KB Output is correct
6 Correct 10 ms 7108 KB Output is correct
7 Incorrect 3 ms 4948 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 9840 KB Output is correct
2 Correct 20 ms 9872 KB Output is correct
3 Correct 20 ms 9812 KB Output is correct
4 Correct 18 ms 9812 KB Output is correct
5 Correct 18 ms 9812 KB Output is correct
6 Correct 27 ms 10084 KB Output is correct
7 Correct 23 ms 9956 KB Output is correct
8 Correct 19 ms 9716 KB Output is correct
9 Correct 17 ms 9684 KB Output is correct
10 Correct 20 ms 10024 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 7 ms 8660 KB Output is correct
13 Correct 7 ms 8660 KB Output is correct
14 Correct 7 ms 8660 KB Output is correct
15 Correct 7 ms 8660 KB Output is correct
16 Correct 7 ms 8660 KB Output is correct
17 Correct 8 ms 8660 KB Output is correct
18 Correct 7 ms 8724 KB Output is correct
19 Correct 7 ms 8660 KB Output is correct
20 Incorrect 2 ms 4948 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Incorrect 2 ms 5004 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 14104 KB Output is correct
2 Correct 33 ms 14072 KB Output is correct
3 Correct 23 ms 11456 KB Output is correct
4 Correct 6 ms 6356 KB Output is correct
5 Correct 6 ms 5716 KB Output is correct
6 Correct 10 ms 7108 KB Output is correct
7 Incorrect 3 ms 4948 KB Output isn't correct
8 Halted 0 ms 0 KB -