Submission #1081504

#	Time	Username	Problem	Language	Result	Execution time	Memory
1081504		KasymK	Cyberland (APIO23_cyberland)	C++17	49 / 100	3099 ms	548312 KiB

cyberland

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second   
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}

double solve(int n, int m, int k, int h, vector<int> x, vector<int> y, vector<int> c, vector<int> arr){
    vector<pii> adj[n];
    for(int i = 0; i < m; ++i){
        adj[x[i]].pb({y[i], c[i]});
        adj[y[i]].pb({x[i], c[i]});
    }
    // wr;
    queue<int> q;
    vector<bool> vis0(n, 0);
    q.push(0); // we start at node 0
    vis0[0] = 1;
    while(!q.empty()){
        int x = q.front();
        q.pop();
        if(x == h)
            continue; // h-a baramyzdan sonra goni durmaly bolyas
        for(auto [i, w] : adj[x])
            if(!vis0[i]){
                vis0[i] = 1;
                q.push(i);
            }
    }
    // wr;
    if(!vis0[h])
        return -1;
    // pq.1 = my weight, pq.2 = which node, pq.3 = how many times I used special power 2
    priority_queue<tuple<double, int, int>, vector<tuple<double, int, int>>, greater<tuple<double, int, int>>> pq;
    pq.push({0, 0, 0});
    for(int i = 0; i < n; ++i)
        if(arr[i] == 0 and vis0[i])
            pq.push({0, i, 0}); // we can start at this points
    // wr;
    double answer = 1e18;
    vector<vector<bool>> vis(n, vector<bool> (k+1, 0));
    while(!pq.empty()){
        double val;
        int x, cnt;
        tie(val, x, cnt) = pq.top();
        pq.pop();
        if(vis[x][cnt])
            continue;
        vis[x][cnt] = 1;
        if(x == h){
            umin(answer, val);
            continue;
        }
        for(auto &[i, w] : adj[x]){
            if(!vis[i][cnt])
                pq.push({val+w, i, cnt});
            if(arr[i] == 2 and cnt < k and !vis[i][cnt+1])
                pq.push({(val+w)/(double)2, i, cnt+1});
        }
    }
    return answer;
}

// int main(){
//     double kk = solve(3, 2, 30, 2,{1, 2},{2, 0},{12, 4},{1, 2, 1});
//     double kk1 = solve(4, 4, 30, 3,{0, 0, 1, 2},{1, 2, 3, 3},{5, 4, 2, 4},{1, 0, 2, 1});
//     if(kk == 4.0 and kk1 == 2.0)
//         puts("Correct.");
//     else
//         puts("Wrong Answer.");
//     return 0;
// }

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