Submission #804451

#	Time	Username	Problem	Language	Result	Execution time	Memory
804451		Theo830	Cyberland (APIO23_cyberland)	C++17	44 / 100	36 ms	9464 KiB

cyberland

#include "cyberland.h"
#include <bits/stdc++.h>
using namespace std;
#define f(i,a,b) for(int i = a;i < b;i++)
#define ll long long
#define ii pair<ll,ll>
#define F first
#define S second
#define pb push_back
priority_queue<ii,vector<ii>,greater<ii> >pq;
bool v[100005] = {0};
ll dist[100005];
vector<vector<ii> >adj;
ll H;
void dfs(ll idx){
    v[idx] = 1;
    for(auto x:adj[idx]){
        if(!v[x.F] && x.F != H){
            dfs(x.F);
        }
    }
}
double solve(int n, int m, int k, int h, std::vector<int> x, std::vector<int> y, std::vector<int> c, std::vector<int> arr) {
    double ans;
    H = h;
    adj.assign(n+5,vector<ii>());
    f(i,0,n){
        v[i] = 0;
        dist[i] = 1e18;
    }
    f(i,0,m){
        adj[x[i]].pb(ii(y[i],c[i]));
        adj[y[i]].pb(ii(x[i],c[i]));
    }
    dfs(0);
    f(i,0,n){
        if((arr[i] == 0 && v[i]) || i == 0){
            pq.push(ii(0,i));
            dist[i] = 0;
        }
    }
    while(!pq.empty()){
        ii f = pq.top();
        pq.pop();
        ll w = f.F,u = f.S;
        if(dist[u] < w){
            continue;
        }
        for(auto x:adj[u]){
            if(dist[x.F] > dist[u] + x.S){
                dist[x.F] = dist[u] + x.S;
                pq.push(ii(dist[x.F],x.F));
            }
        }
    }
    ans = dist[h];
    if(dist[h] == 1e18){
        ans = -1;
    }
    return ans;
}

• Subtask 1: 0 / 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