Submission #1081547

#	Time	Username	Problem	Language	Result	Execution time	Memory
1081547		KasymK	Cyberland (APIO23_cyberland)	C++17	97 / 100	3099 ms	1375728 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> a){
    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]});
    }
    vector<bool> vis(n, 0);
    queue<int> Q;
    Q.push(0);
    vis[0] = 1;
    while(!Q.empty()){
        int x = Q.front();
        Q.pop();
        if(x == h)
            continue;
        for(auto &[i, w] : adj[x])
            if(!vis[i]){
                vis[i] = 1;
                Q.push(i);
            }
    }
    if(!vis[h])
        return -1;
    using node = pair<double, int>;
    priority_queue<node, vector<node>, greater<node>> q[k+2];
    vector<vector<bool>> mrk(n, vector<bool> (k+1, 0));
    q[0].push({0, 0});
    for(int i = 1; i < n; ++i)
        if(!a[i] and vis[i])
            q[0].push({0, i});
    int pk = 0;
    double answer = 1e18;
    while(pk <= k){
        if(q[pk].empty()){
            ++pk;
            continue;
        }
        auto [val, x] = q[pk].top();
        q[pk].pop();
        if(x == h){
            umin(answer, val);
            mrk[x][pk] = 1;
        }
        if(mrk[x][pk]) 
            continue;
        mrk[x][pk] = 1;
        for(auto [i, w] : adj[x])
            if(a[i]){
                if(!mrk[i][pk])
                    q[pk].push({val+w, i});
                if(a[i] == 2)
                    q[pk+1].push({(val+w)/2, i});
            }
    }
    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: 19 / 19
• Subtask 5: 7 / 7
• Subtask 6: 16 / 16
• Subtask 7: 29 / 29
• Subtask 8: 0 / 3