Submission #1061423

#	Time	Username	Problem	Language	Result	Execution time	Memory
1061423		Muhammet	Cyberland (APIO23_cyberland)	C++17	0 / 100	28 ms	8796 KiB

cyberland

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

using namespace std;

#define ff first
#define ss second

vector <pair<int,int>> v[200005];

double v1[10][10];

double solve(int n, int m, int k, int h, vector<int> x, vector<int> y, vector<int> c, vector<int> arr) {
    for(int i = 0; i <= n; i++){
        v[i].clear();
    }
    for(int i = 0; i < m; i++){
        v[x[i]].push_back({y[i],c[i]});
        v[y[i]].push_back({x[i],c[i]});
    }
    if(n == 2){
        for(int i = 0; i < n; i++){
            for(int j = 0; j < n; j++){
                v1[i][j] = -1;
            }
        }
        for(int i = 0; i < m; i++){
            v1[x[i]][y[i]] = c[i];
            v1[y[i]][x[i]] = c[i];
        }
        double ans = v1[0][h];
        return ans;
    }
    else if(n <= 3){
        for(int i = 0; i < n; i++){
            for(int j = 0; j < n; j++){
                v1[i][j] = -1;
            }
        }
        for(int i = 0; i < m; i++){
            v1[x[i]][y[i]] = c[i];
            v1[y[i]][x[i]] = c[i];
        }
        int h1;
        if(h == 1) h1 = 2;
        else h1 = 1;
        double ans = 1e9;
        if(v1[0][h] != -1){
            ans = min(ans,v1[0][h]);
        }
        if(v1[0][h1] != -1 and v1[h1][h] != -1){
            if(arr[h1] == 0){
                ans = min(ans, v1[h1][h]);
            }
            else if(arr[h1] == 2 and k > 0){
                v1[0][h1] /= 2;
                ans = min(ans, v1[0][h1] + v1[h1][h]);
            }
        }
        if(ans == 1e9){
            return -1;
        }
        return ans;
    }
    else {
        vector <int> d(n,1e9);
        d[0] = 0;
        priority_queue <pair<int,int>> q;
        q.push({0,0});
        while(!q.empty()){
            pair <int,int> w1 = q.top();
            q.pop();
            w1.ff *= (-1);
            if(w1.ff != d[w1.ss]) continue;
            for(auto i : v[w1.ss]){
                if(d[i.ff] > d[w1.ss] + i.ss){
                    d[i.ff] = d[w1.ss] + i.ss;
                    q.push({-d[i.ff],i.ff});
                }
            }
        }
        if(d[h] == 1e9) d[h] = -1;
        return d[h];
    }
}

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