oj.uz

Submission #916744

# Submission time Handle Problem Language Result Execution time Memory
916744 2024-01-26T12:47:37 Z Ninedesu Dreaming (IOI13_dreaming) C++14
0 / 100
 34 ms 15908 KB 
#include "dreaming.h"
#include<bits/stdc++.h>
#define ll long long
#define pii pair<ll,int>
using namespace std;

const int N=1e5+1;
int compo;
ll a,adis,b,bdis,c,cdis;
ll dis[N];
bool chk;
bitset<N>vis;
vector<pii>adj[N];

void dfs1(int u,int p,bool boo){
    vis[u]=true;
    if(!boo&&dis[u]>adis){
        a=u;
        adis=dis[u];
    }
    else if(boo&&dis[u]>bdis){
        b=u;
        bdis=dis[u];
    }
    //if(boo)cout << u << ',' << dis[u] << ' ';
    for(pii wv:adj[u]){
        ll w=wv.first;
        int v=wv.second;
        if(v==p)continue;
        dis[v]=dis[u]+w;
        dfs1(v,u,boo);
    }
}

void dfs2(int u,int p){
    if(u==a){
        chk=true;
        c=u;
        cdis=bdis;
        //cout << u << ',' << bdis << ' ';
        return ;
    }
    for(pii wv:adj[u]){
        int v=wv.second;
        if(v==p)continue;
        dfs2(v,u);
        if(chk){
            //cout << u << ',' << bdis-dis[u] << ' ';
            if(max(dis[u],bdis-dis[u])<cdis){
                c=u;
                cdis=max(dis[u],bdis-dis[u]);
            }
            return ;
        }
    }
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    for(int i=0; i<M; i++){
        adj[A[i]].push_back({T[i],B[i]});
        adj[B[i]].push_back({T[i],A[i]});
    }
    ll mx=0,smx=0,mxb=0;
    for(int i=0; i<N; i++){
        if(vis[i])continue;
        compo++;
        a=i;
        adis=0,bdis=0;
        chk=false;
        dis[i]=0;
        dfs1(i,-1,0);
        dis[a]=0;
        b=a,c=a;
        dfs1(a,-1,1);
        //cout << bdis << '\n';
        dfs2(b,-1);
        if(cdis>=mx){smx=mx;mx=cdis;}
        else if(cdis>smx)smx=cdis;
        mxb=max(bdis,mxb);
        //cout << c << '|' << cdis << "\n\n";
    }

    if(compo>1)return mx+smx+L;
    else return mxb;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 34 ms 15908 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4444 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 34 ms 15908 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 6488 KB Output is correct
2 Incorrect 12 ms 6492 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4444 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 34 ms 15908 KB Output isn't correct
2 Halted 0 ms 0 KB -