Submission #1017118

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017118		Kodik	Crocodile's Underground City (IOI11_crocodile)	C++17	0 / 100	1 ms	4444 KiB

crocodile

#include "crocodile.h"
#include <bits/stdc++.h>
using namespace std;
#define ss second
#define ff first
typedef long long ll;
// #define int ll
int mod = 1e9+7;

int travel_plan(int N, int M, int R[][2], 
    int L[], int k, int p[]){
    int n = N, m = M;
    vector<vector<pair<int,int>>> adj(n);
    for(int i = 0; i < m; ++i){
        int a = R[i][0],b = R[i][1],c = L[i];
        adj[a].push_back({c,b});
        adj[b].push_back({c,a});
    }
    for(int i = 0; i < n; ++i){
      sort(adj[i].begin(), adj[i].end());
    }
    set<int> exit;
    for(int i = 0; i < k; ++i){
        exit.insert(p[i]);
    }
    priority_queue<pair<ll,ll>, vector<pair<ll,ll>>, greater<pair<ll,ll>>> pq;
    vector<ll> dis(n, 1e18);
    int ans = INT_MAX;
    dis[0] = 0;
    pq.push({0,0});
    bool pass = 0;
    while(!pq.empty()){
        pair<int,int> a = pq.top(); pq.pop();
        if(dis[a.ss]!=a.ff){
            continue;
        }
        if(exit.find(a.ss)!=exit.end()){
            ans = min(ans, a.ff);
        }
        pass = false;
        for(auto &[w, nxt] : adj[a.ss]){
            if(a.ff+w<dis[nxt]&&pass){
                dis[nxt] = a.ff+w;
                pq.push({a.ff+w,nxt});
            }else if(a.ff+w>=dis[nxt]){
                continue;
            }
            pass = true;
        }        
    }
    return ans;
}

// signed main(){
//     ios_base::sync_with_stdio(false);
//     cin.tie(NULL);
//     // ifstream cin ("shortcut.in");
//     // ofstream cout ("shortcut.out");
    
//     return 0;   
// }

• Subtask 1: 0 / 46
• Subtask 2: 0 / 43
• Subtask 3: 0 / 11