Submission #985149

#	Time	Username	Problem	Language	Result	Execution time	Memory
985149		Sir_Ahmed_Imran	Cyberland (APIO23_cyberland)	C++17	49 / 100	3038 ms	33992 KiB

cyberland

                              ///~~~LOTA~~~///
#include "cyberland.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define append push_back
#define add insert
#define nl '\n'
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define all(x) (x).begin(),(x).end()
#define L0TA ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define terminator main
#define N 100000
#define K 31
int t;
int vis[N];
double dp[N][K];
vector<pair<int,double>> a[N];
void dfs(int v){
    if(vis[v] || v==t) 
        return;
    vis[v]=1;
    for(auto& i:a[v])
        dfs(i.ff);
}
double solve(int n,int m,int k,int h,vector<int> x,vector<int> y,vector<int> c,vector<int> arr){
    t=h;
    int p;
    double q,r;
    for(int i=0;i<n;i++){
        for(int j=0;j<=k;j++)
            dp[i][j]=1e17;
        a[i].clear();
        vis[i]=0;
    }
    for(int i=0;i<m;i++){
        a[x[i]].append({y[i],c[i]});
        a[y[i]].append({x[i],c[i]});
    }
    dfs(0);
    r=1e17;
    priority_queue<pair<double,int>,vector<pair<double,int>>,greater<pair<double,int>>> Q;
    for(int i=0;i<n;i++)
        if(vis[i] && !arr[i])
            dp[i][0]=0;
    for(int j=dp[0][0]=0;j<=k;j++){
        for(int i=0;i<n;i++){
            Q.push({dp[i][j],i});
            vis[i]=0;
        }
        while(!Q.empty()){
            p=Q.top().ss;
            q=Q.top().ff;
            Q.pop();
            if(!vis[p]){
                vis[p]=1;
                if(p==h){
                    r=min(r,q);
                    continue;
                }
                if(j<k) dp[p][j+1]=min(q,dp[p][j+1]);
                for(auto& i:a[p]){
                    if(arr[i.ff]==2 && j<k)
                        dp[i.ff][j+1]=min(dp[i.ff][j+1],(q+i.ss)/2);
                    if(!vis[i.ff])
                        Q.push({q+i.ss,i.ff});
                }
            }
        }
    }
    if(r==1e17) r=-1;
    return r;
}

• 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