Submission #1178939

#	Time	Username	Problem	Language	Result	Execution time	Memory
1178939		Muhammet	Cyberland (APIO23_cyberland)	C++17	15 / 100	25 ms	21316 KiB

cyberland

#include "bits/stdc++.h"
#include "cyberland.h"
// #include "stub.cpp"

using namespace std;

#define ff first
#define ss second

vector <vector <pair <int, int>>> v; 

double solve(int n, int m, int k, int h, vector<int> x, vector<int> y, vector<int> c, vector<int> arr) {
    double ans = 1e16;
    v.clear();
    v.resize(n);
    long long s = 0;
    for(int i = 0; i < m; i++) {
        s += c[i];
        v[x[i]].push_back({y[i], c[i]});
        v[y[i]].push_back({x[i], c[i]});
    }
    k = min(k, int(__lg(s) + 5));
    vector <vector <double>> dis(n+1, vector <double> (k+1, 1e16));
    dis[0][0] = 0;
    priority_queue <pair<double, pair <int, int>>> q;
    q.push({0, {0, 0}});
    while(!q.empty()) {
        double ds = -q.top().ff;
        int i = q.top().ss.ff, cn = q.top().ss.ss;
        q.pop();
        if(i == h) ans = min(ans, ds);
        if(dis[i][cn] != ds) continue;
        for(auto [j, w] : v[i]) {
            double dss = ds + w;
            if(dis[j][cn] > dss) {
                dis[j][cn] = dss;
                q.push({-dis[j][cn], {j, cn}});
            }
            if(arr[j] == 0 and dis[j][cn] != 0) {
                dis[j][cn] = 0;
                q.push({-dis[j][cn], {j, cn}});
            }
            if(arr[j] == 2 and cn < k) {
                dss /= 2;
                if(dis[j][cn] > dss) {
                    dis[j][cn] = dss;
                    q.push({-dis[j][cn], {j, cn+1}});
                }
            }
        }
    }
    return (ans == 1e16 ? -1 : ans);
}

• Subtask 1: 0 / 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