제출 #983247

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
983247		vjudge1	Cyberland (APIO23_cyberland)	C++17	0 / 100	1145 ms	3508 KiB

cyberland

#include <vector>
#include <queue>
#include <limits>

using namespace std;

const int INF = numeric_limits<int>::max();

double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr) {
    // Initialize the priority queue to store (time, country) pairs
    priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq;
    
    // Initialize the distance array with infinity
    vector<int> dist(N, INF);
    
    // Start from your country (country 0)
    pq.push({0, 0});
    dist[0] = 0; // Time to reach your country is 0
    
    // Dijkstra's algorithm
    while (!pq.empty()) {
        int curr_time = pq.top().first;
        int curr_country = pq.top().second;
        pq.pop();
        
        // If we reached Cyberland, return the time
        if (curr_country == H) return curr_time;
        
        // Iterate over neighboring countries
        for (int i = 0; i < M; ++i) {
            if (x[i] == curr_country || y[i] == curr_country) {
                int next_country = (x[i] == curr_country) ? y[i] : x[i];
                int time_to_next = c[i];
                
                // Apply special abilities if available
                if (arr[curr_country] == 2 && K > 0) {
                    time_to_next /= 2;
                    --K; // Reduce the number of times we can use divide-by-2 ability
                }
                if(arr[curr_country] == 0) {
                	time_to_next = 0;
				}
                
                // Update the time to reach the neighboring country if needed
                if (curr_time + time_to_next < dist[next_country]) {
                    dist[next_country] = curr_time + time_to_next;
                    pq.push({dist[next_country], next_country});
                }
            }
        }
    }
    
    // If Cyberland is unreachable, return -1
    return -1;
}

• 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