oj.uz

Submission #1010716

# Submission time Handle Problem Language Result Execution time Memory
1010716 2024-06-29T09:55:11 Z a_aguilo Crocodile's Underground City (IOI11_crocodile) C++14
100 / 100
 424 ms 77420 KB 
#include "crocodile.h"
#include <bits/stdc++.h>
//#include "crocodile.h"
#define vi vector<int>
#define vc vector
#define pi pair<int,int>
using namespace std;

vc<vc<pi>> edg; // Edges, aka the corridors coming out from each room
vi padreSecond;
vi padreFirst;
vc<pi> dis; // The two minimum distances found between 2 nodes. The fastest route will just be used to calculate the second fastest, which is the oke that will be used to obtain the other distances
int fpath = -1e9-7; // Fastest path
int u, c; // Amazing the amount of situations when a node and a cost can be useful

void dijkstra(int k, int p[]){
    priority_queue<vi> tv; // To Visit, not TeleVision or To Vandalize
    for(int i = 0; i < k; i++){
        tv.push({0,p[i], -1});
        dis[p[i]].first = 0;
        dis[p[i]].second = 0;
      }
    while(!tv.empty()){
        vector<int> act = tv.top();
        u = act[1]; // The node being explored right now
        c = act[0];
        int padre = act[2]; // The cost to get to u
        tv.pop();
        
        if((dis[u].second!=c) or (padre != padreSecond[u])){continue;} // If this path is worse then why bother
        if(u == 0){
            fpath = max(fpath, c);
            continue;}
            
        for(pi p : edg[u]){     // p.first = cost, p.second = node the path leads to
          if(p.second != u and dis[p.second].first != 0){
            if (p.first + c > dis[p.second].second){    // If this is path you've found is fastest than the second fastest one...
                if (p.first + c > dis[p.second].first){     // And than the fastest one...
                    dis[p.second].second = dis[p.second].first;     // Then the previously fastest one becomes the second fastest one...
                    padreSecond[p.second] = padreFirst[p.second];
                    padreFirst[p.second] = u;
                    dis[p.second].first = p.first + c;}     // This new path becomes the fastest!
                    
                else{ // But if it's not fastest than the fastest one...
                    dis[p.second].second = p.first + c;
                    padreSecond[p.second] = u;
                  }
                    
                tv.push({dis[p.second].second, p.second, padreSecond[p.second]});
            

            }
          }
        }
    }
}



int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]){
  padreSecond = vi(N, -1);
  padreFirst = vi(N, -1);
    edg = vc<vc<pi>>(N);
    for(int i = 0; i < M; i++){
        edg[R[i][0]].push_back({-L[i],R[i][1]});
        edg[R[i][1]].push_back({-L[i],R[i][0]});}
    
    dis = vc<pi>(N,{-1e9-7,-1e9-7});  
        
    dijkstra(K,P);

return -fpath;}

Subtask #1
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 600 KB Output is correct

Subtask #2
43.0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 2 ms 712 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 456 KB Output is correct
12 Correct 2 ms 860 KB Output is correct
13 Correct 2 ms 776 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 2 ms 712 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 456 KB Output is correct
12 Correct 2 ms 860 KB Output is correct
13 Correct 2 ms 776 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 312 ms 62400 KB Output is correct
17 Correct 82 ms 19968 KB Output is correct
18 Correct 99 ms 21200 KB Output is correct
19 Correct 424 ms 77420 KB Output is correct
20 Correct 160 ms 47444 KB Output is correct
21 Correct 33 ms 7948 KB Output is correct
22 Correct 207 ms 46288 KB Output is correct