Submission #1115923

#	Time	Username	Problem	Language	Result	Execution time	Memory
1115923		Faisal_Saqib	Cyberland (APIO23_cyberland)	C++17	49 / 100	39 ms	12880 KiB

cyberland

#include "cyberland.h"
#include <bits/stdc++.h>
 
 
// #include "stub.cpp"
 
using namespace std;
const int N=1e5+10;
const long double inf=1e18;
int n,arr[N];
vector<pair<int,long long>> adj[N];
long double dist[N],MS=-1;
long double dyk(int s,int e)
{
    for(int j=0;j<n;j++)
        dist[j]=inf;
    priority_queue<pair<long double,int>,vector<pair<long double,int>>,greater<pair<long double,int>>> pq;
    dist[s]=0;
    pq.push({dist[s],s});
    while(pq.size())
    {
        auto tp=pq.top();
        pq.pop();
        if(tp.second==e) // this is cz we dont go other side of h
            continue;
        if(tp.first==dist[tp.second])
        {
            int v=tp.second;
            for(auto [u,w]:adj[v])
            {
                if((dist[v]+w)<dist[u])
                {
                    dist[u]=dist[v]+w;
                    pq.push({dist[u],u});
                }
            }
        }
    }
    // cout<<"DY from "<<s<<endl;
    // for(int pp=0;pp<n;pp++)
    // {
    //     cout<<dist[pp]<<' ';
    // }
    // cout<<endl;
    return ((dist[e]==inf)?MS:dist[e]);
}
long double dyk_comb(int e)
{
    dyk(0,e);
    priority_queue<pair<long double,int>,vector<pair<long double,int>>,greater<pair<long double,int>>> pq;
    for(int j=0;j<n;j++)
    {
        if(dist[j]!=inf and (j==0 or arr[j]==0))
        {
            dist[j]=0;
            pq.push({0,j});            
        }
        else
            dist[j]=inf;
    }
    while(pq.size())
    {
        auto tp=pq.top();
        pq.pop();
        if(tp.first==dist[tp.second])
        {
            if(tp.second==e)
            {
                continue;
            }
            int v=tp.second;
            if(arr[v]==2)
            {
                dist[v]/=2;
                tp.first/=2;
            }
            for(auto [u,w]:adj[v])
            {
                if((dist[v]+w)<dist[u])
                {
                    dist[u]=dist[v]+w;
                    pq.push({dist[u],u});
                }
            }
        }
    }
    return ((dist[e]==inf)?MS:dist[e]);
}
double solve(int NP, int m, int k, int h, vector<int> x, vector<int> y, vector<int> c, vector<int> AS) {
    n=NP;
    // DONT FORGET TO CLEAR THE THINGS YOU USED
    for(int i=n-1;i>=0;i--)
    {
        if(AS[i]==2)
        {
            if(k==0)
            {
                AS[i]=1;
            }
            else
                k--;
        }
    }
    for(int i=0;i<n;i++)
    {
        arr[i]=AS[i];
        adj[i].clear();
    }
    for(int j=0;j<m;j++)
    {
        adj[x[j]].push_back({y[j],c[j]});
        adj[y[j]].push_back({x[j],c[j]});
    }
    return dyk_comb(h);
}

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 0 / 19
• Subtask 5: 7 / 7
• Subtask 6: 16 / 16
• Subtask 7: 0 / 29
• Subtask 8: 0 / 3