Submission #1009513

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009513		Muaath_5	Cyberland (APIO23_cyberland)	C++17	97 / 100	3049 ms	95140 KiB

cyberland

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast,O3,unroll-loops")
#pragma GCC target("avx2,avx,sse3,sse4")
#define F first
#define S second
#define pii pair<int, double>
using namespace std;
const int mxN = 100000;
const double inf = 1e18;
struct path
{
  int i, k;
  double val;
};
bool operator<(const path &a, const path &b)
{
  return a.val < b.val;
}
bool operator>(const path &a, const path &b)
{
  return a.val > b.val;
}
double dp[mxN][69]; 
vector<pii> v[mxN];
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();
  K = min(K,68);
  for (int i = 0; i < M; i++)
  {
    v[x[i]].push_back({y[i], (double)c[i]});
    v[y[i]].push_back({x[i], (double)c[i]});
  }
  for(int i = 0;i < N;i++)
    for(int j = 0;j <= K;j++)
      dp[i][j] = inf;
  priority_queue<path,vector<path>,greater<path>>q;
  q.push({0,0,0});
  dp[0][0] = 0;
  while(q.size()){
    const auto u = q.top();
    q.pop();
    if(u.val < dp[u.i][u.k] || u.i == H) continue;
    for(const auto &x : v[u.i]){
      if (arr[x.F] == 0 && dp[x.F][u.k] != (double)0)
      {
        dp[x.F][u.k] = (double)0;
        q.push({x.F, u.k, (double)0});
      }
      if(dp[x.F][u.k] > dp[u.i][u.k] + x.S){
        dp[x.F][u.k] = dp[u.i][u.k] + x.S;
        q.push({x.F,u.k,dp[x.F][u.k]});
      }
      if(arr[u.i] == 2 && u.k != K && dp[x.F][u.k + 1] > dp[u.i][u.k] / 2 + x.S){
        dp[x.F][u.k + 1] = dp[u.i][u.k] / 2 + x.S;
        q.push({x.F,u.k + 1,dp[x.F][u.k + 1]});
      }
    }
  }
  double ans = inf;
  for(int i = 0;i <= K;i++){
    ans = min(ans,dp[H][i]);
  }
  return ans == inf ? -1 : ans;
}

• 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