Submission #1292874

#	Time	Username	Problem	Language	Result	Execution time	Memory
1292874		goulthen	Cyberland (APIO23_cyberland)	C++20	20 / 100	249 ms	38968 KiB

cyberland

#include <bits/stdc++.h>
#include "cyberland.h"

using namespace std;

#define ld long double
#define pii pair<int,int>
#define ll long long
#define rep(i,a,b) for(int i = a; i <= b; i++)
const ll INF = 1e18+10;
using z = pair<ld,pii>;

double solve(int N, int M, int K, int H, std::vector<int> x, std::vector<int> y, std::vector<int> c, std::vector<int> arr) {
    K=min(K,30);
    vector<vector<ld>> dist(N, vector<ld>(K,INF));
    vector<vector<bool>> vis(N, vector<bool>(K,0LL));
    vector<vector<pii>> g(N);

    rep(i,0,M-1) {
        g[x[i]].emplace_back(y[i],c[i]);
        g[y[i]].emplace_back(x[i],c[i]);
    }
 
    priority_queue<z,vector<z>,greater<z>> pq;
    dist[0][0] = 0;
    pq.push({0,{0,0}});

    while (!pq.empty()) {
        auto [d,f] = pq.top();pq.pop();
        int u = f.first;
        int ck = f.second;
        if(vis[u][ck]) continue;
        //cout << u << ' ' << d << ' ' << ck << '\n';
        vis[u][ck] = 1;
        if(u==H) continue;
        for(auto &[v,w] : g[u]) {
            int cck = ck;
            ld nd = d;
            if(arr[u] == 2 && ck<K-1) {
                nd /= 2;
                cck++;
            }
            if (arr[u] == 0) nd = 0;
            nd+=w;
            if (nd >= dist[v][cck]) continue;

            dist[v][cck] = nd;
            pq.push({dist[v][cck],{v,cck}});
        }
    }

    ld ans = INF;
    rep(i,0,K-1) ans = min(ans,dist[H][i]);

    if(ans == INF) return -1;
    return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 19
• Subtask 5: 7 / 7
• Subtask 6: 0 / 16
• Subtask 7: 0 / 29
• Subtask 8: 0 / 3