Submission #970574

#	Time	Username	Problem	Language	Result	Execution time	Memory
970574		SuPythony	Cyberland (APIO23_cyberland)	C++17	8 / 100	880 ms	2097152 KiB

cyberland

#include "cyberland.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

vector<vector<pair<int,int>>> al;
double ans;
double curr;

void dfs(int i, int p, int f, vector<int> a) {
    if (i==f) {
        ans=curr;
        return;
    }
    double prev=curr;
    if (a[i]==0) curr=0.0;
    for (auto v: al[i]) {
        if (v.first==p) continue;
        curr+=v.second;
        dfs(v.first,i,f,a);
        if (a[i]==0) curr=0.0;
        else curr=prev;
    }
    curr=prev;
}

double solve(int N, int M, int K, int H, vector<int> x, vector<int>
y, vector<int> c, vector<int> a) {
    curr=0.0;
    al.assign(N,vector<pair<int,int>>());
    for (int i=0; i<M; i++) {
        al[x[i]].push_back({y[i],(double)c[i]});
        al[y[i]].push_back({x[i],(double)c[i]});
    }
    dfs(0,-1,H,a);
    return ans;
}

• Subtask 1: 0 / 5
• Subtask 2: 8 / 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