Submission #942933

#	Time	Username	Problem	Language	Result	Execution time	Memory
942933		kunzaZa183	Cyberland (APIO23_cyberland)	C++17	68 / 100	3083 ms	51876 KiB

cyberland

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

vector<vector<double>> dp;
vector<vector<pair<int, int>>> adjlist;
vector<int> type;

int maxk;
int target;

void recur(int node, int curk, double curw)
{
  if (type[node] == 0)
    curw = 0;
  else if (type[node] == 2)
  {
    if (curw < dp[node][curk])
    {
      dp[node][curk] = curw;
      if (node == target)
        return;
      for (auto a : adjlist[node])
        recur(a.first, curk, curw + a.second);
    }
    curw /= 2;
    curk++;
  }
  if (curk > maxk)
    return;
  if (curw < dp[node][curk])
  {
    dp[node][curk] = curw;
    if (node == target)
      return;
    for (auto a : adjlist[node])
      recur(a.first, curk, curw + a.second);
  }
}

double solve(int N, int M, int K, int H, vector<int> x, vector<int> y, vector<int> c, vector<int> arr)
{
  K = 30;
  maxk = K;
  target = H;
  type = arr;
  dp.clear();
  adjlist.clear();
  adjlist.resize(N);
  for (int i = 0; i < M; i++)
    adjlist[x[i]].push_back({y[i], c[i]}), adjlist[y[i]].push_back({x[i], c[i]});
  dp.resize(N);
  for (auto &a : dp)
    a.resize(K + 1, 1e15);
  recur(0, 0, 0);
  double mini = 1e15;
  for (int i = 0; i <= K; i++)
    mini = min(mini, dp[H][i]);
  if (mini == 1e15)
    return -1;
  return mini;
}

• 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: 0 / 29
• Subtask 8: 0 / 3