제출 #1017887

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1017887		Kodik	악어의 지하 도시 (IOI11_crocodile)	C++17	100 / 100	326 ms	65672 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());
    }
    priority_queue<pair<ll,ll>, vector<pair<ll,ll>>, greater<pair<ll,ll>>> pq;
    vector<vector<ll>> dis(2,vector<ll>(n, 1e18));
    for(int i = 0; i < k; ++i){
        pq.push({0,p[i]});
        dis[0][p[i]] = 0;
        dis[1][p[i]] = 0;
    }
    while(!pq.empty()){
        pair<int,int> a = pq.top(); pq.pop();
        if(dis[1][a.ss]!=a.ff){
            continue;
        }
        for(auto &[w, nxt] : adj[a.ss]){
            if(a.ff+w<dis[0][nxt]){
                if(dis[0][nxt]!=dis[1][nxt]){
                    pq.push({dis[0][nxt], nxt});
                }
                swap(dis[0][nxt], dis[1][nxt]);
                dis[0][nxt] = a.ff+w;
            }else if(a.ff+w<dis[1][nxt]){
                dis[1][nxt] = a.ff+w;
                pq.push({dis[1][nxt], nxt});
            }
        }        
    }
    return dis[1][0];
}

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

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