Submission #729869

#	Time	Username	Problem	Language	Result	Execution time	Memory
729869		kirakaminski968	Crocodile's Underground City (IOI11_crocodile)	C++17	100 / 100	585 ms	63120 KiB

crocodile

#include <bits/stdc++.h>
using namespace std;
int solve(int N,int M,int (*edges)[2],int *times,int K,int *positions){
    vector<pair<int,int>> adj[N];
    for(int i = 0;i<M;++i){
        adj[edges[i][0]].push_back({edges[i][1],times[i]});
        adj[edges[i][1]].push_back({edges[i][0],times[i]});
    }
    vector<int> vis(N,0); vector<vector<int>> dist(N);
    priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>> pq;
    for(int i = 0;i<K;++i){
        int cur = positions[i];
        vis[cur]++;
        dist[cur].push_back(0); dist[cur].push_back(0);
        pq.push({0,cur});
    }
    while(!pq.empty()){
        int u = pq.top().second; int dis = pq.top().first; pq.pop();
        if(vis[u] >= 2) continue;
        vis[u]++;
        if(vis[u] != 2) continue;
        if(u == 0) return dis;
        for(auto p : adj[u]){
            int v = p.first;
            if(dist[v].size() == 2){
                sort(dist[v].begin(),dist[v].end());
                if(dist[v][1] > p.second+dis){
                    dist[v].pop_back(); dist[v].push_back(dis+p.second);
                    pq.push({p.second+dis,v});
                }
            }
            else{
                dist[v].push_back(p.second+dis);
                pq.push({p.second+dis,v});
            }
        }
    }
}
int travel_plan(int N,int M,int (*R)[2],int *L,int K,int *P){
    return solve(N,M,R,L,K,P);
}

Compilation message (stderr)

crocodile.cpp: In function 'int solve(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:38:1: warning: control reaches end of non-void function [-Wreturn-type]
   38 | }
      | ^

• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 11 / 11