Submission #1196651

#	Time	Username	Problem	Language	Result	Execution time	Memory
1196651		Mousa_Aboubaker	사이버랜드 (APIO23_cyberland)	C++20	100 / 100	2437 ms	139588 KiB

cyberland

#include "cyberland.h"
#include <bits/stdc++.h>
using namespace std;

double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr)
{
    vector adj(N, vector<pair<int, int>>());
    for (int i = 0; i < M; i++)
    {
        adj[x[i]].push_back({y[i], c[i]});
        adj[y[i]].push_back({x[i], c[i]});
    }
    K = min(K, 80);
    vector dp(N, vector<long double>(K + 1, 1e15));
    dp[0][0] = 0;
    queue<tuple<int, int>> q;
    q.push({0, 0});
    while(not q.empty())
    {
        auto [u, c] = q.front();
        q.pop();

        for(auto [v, w]: adj[u])
        {
            if(arr[v] == 0 and dp[v][c] != 0)
            {
                dp[v][c] = 0;
                q.push({v, c});
                continue;
            }

            long double curr = dp[u][c] + w;
            if(dp[v][c] > curr)
            {
                dp[v][c] = curr;
                if(v != H)
                    q.push({v, c});
            }

            if(arr[v] == 2 and c < K)
            {
                long double curr2 = (dp[u][c] + w) / 2;
                if(dp[v][c + 1] > curr2)
                {
                    dp[v][c + 1] = curr2;
                    q.push({v, c + 1});
                }
            }
        }
    }

    long double res = 1e15;
    for(int i = 0; i <= K; i++)
        res = min(res, dp[H][i]);
    
    if(res == 1e15)
        res = -1;
    return res;
}

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 19 / 19
• Subtask 5: 7 / 7
• Subtask 6: 16 / 16
• Subtask 7: 29 / 29
• Subtask 8: 3 / 3