Submission #884535

#	Time	Username	Problem	Language	Result	Execution time	Memory
884535		Trisanu_Das	Cyberland (APIO23_cyberland)	C++17	0 / 100	32 ms	7004 KiB

cyberland

#include <bits/stdc++.h>
#include "cyberland.h"
using namespace std;
 
double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr){
    vector<pair<int, int> > adj[N];
    for(int i = 0; i < M; i++){
        adj[x[i]].push_back({y[i], c[i]});
        adj[y[i]].push_back({x[i], c[i]});
    }
    long long dist[N];
    fill(dist, dist + N, LLONG_MAX);
    dist[H] = 0;
    set<pair<long long, int> > s;
    s.insert({0, H});
    while(!s.empty()){
        auto p = *s.begin();
        s.erase(s.begin());
        int u = p.second, curr_d = p.first;
        for(auto [v, c] : adj[p.second]){
            if(curr_d + c < dist[v]){
                auto f = s.find(make_pair(dist[v], v));
                if(f != s.end()) s.erase(f);
                dist[v] = curr_d + c;
                s.insert({dist[v], v});
            }
        }
    }
    if(dist[0] == LLONG_MAX) return -1;
    long long ans = dist[0];
    queue<int> q;
    q.push(0);
    bool vis[N] = {false};
    vis[0] = vis[H] = true;
    while(!q.empty()){
        int u = q.front();
        q.pop();
        if(!arr[u]) ans = min(ans, dist[u]);
        for(auto [v, c] : adj[u]) if(!vis[v]) {
            vis[v] = true;
            q.push(v);
        }
    }
    return ans;
}

Compilation message (stderr)

cyberland.cpp: In function 'double solve(int, int, int, int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
cyberland.cpp:19:13: warning: unused variable 'u' [-Wunused-variable]
   19 |         int u = p.second, curr_d = p.first;
      |             ^

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