Submission #1281237

#	Time	Username	Problem	Language	Result	Execution time	Memory
1281237		repmann	Rail (IOI14_rail)	C++20	30 / 100	55 ms	57312 KiB

rail

#include <bits/stdc++.h>
#include "rail.h"
using namespace std;
int N;
int DIST[5000][5000];
//int getDistance(int i, int j)
//{
//  cout << i << ' ' << j << '\n';
//  int ret;
//  cin >> ret;
//  return ret;
//}
void findLocation(int n, int location0, int location[], int stype[])
{
  N = n;
  stype[0] = 1;
  location[0] = location0;
  vector <pair <int, int>> V, L, R;
  for(int i = 1; i < N; i++)
  {
    DIST[0][i] = DIST[i][0] = getDistance(0, i);
    V.push_back({DIST[0][i], i});
  }
  sort(V.begin(), V.end());
  int d = V.begin()->second;
  stype[d] = 2;
  location[d] = location[0] + V.begin()->first;
  for(int i = 1; i < N; i++)
  {
    if(i == d) continue;
    DIST[d][i] = DIST[i][d] = getDistance(d, i);
  }
  for(int i = 1; i < N; i++)
  {
    if(i == d) continue;
    if(DIST[0][i] == (DIST[0][d] + DIST[d][i])) L.push_back({DIST[d][i], i});
    else R.push_back({DIST[0][i], i});
  }
  if(L.size())
  {
    sort(L.begin(), L.end());
    while(L.begin()->first < DIST[d][0])
    {
      stype[L.begin()->second] = 1;
      location[L.begin()->second] = location[d] - L.begin()->first;
      L.erase(L.begin(), L.begin() + 1);
    }
  }
  if(L.size())
  {
    int prevc = L.begin()->second;
    stype[prevc] = 1;
    location[prevc] = location[d] - DIST[d][prevc];
    for(int i = 1; i < L.size(); i++)
    {
      DIST[prevc][L[i].second] = DIST[L[i].second][prevc] = getDistance(prevc, L[i].second);
      if(DIST[d][L[i].second] == (DIST[d][prevc] + DIST[prevc][L[i].second]))
      {
        stype[L[i].second] = 2;
        location[L[i].second] = location[prevc] + DIST[prevc][L[i].second];
      }
      else
      {
        prevc = L[i].second;
        stype[prevc] = 1;
        location[prevc] = location[d] - DIST[d][prevc];
      }
    }
  }
  if(R.size())
  {
    sort(R.begin(), R.end());
    int prevd = R.begin()->second;
    stype[prevd] = 2;
    location[prevd] = location[0] + DIST[0][prevd];
    for(int i = 1; i < R.size(); i++)
    {
      DIST[prevd][R[i].second] = DIST[R[i].second][prevd] = getDistance(prevd, R[i].second);
      if(DIST[0][R[i].second] == (DIST[0][prevd] + DIST[prevd][R[i].second]))
      {
        stype[R[i].second] = 1;
        location[R[i].second] = location[prevd] - DIST[prevd][R[i].second];
      }
      else
      {
        prevd = R[i].second;
        stype[prevd] = 2;
        location[prevd] = location[0] + DIST[0][prevd];
      }
    }
  }
  return;
}
//int main()
//{
//  int n, location0;
//  cin >> n >> location0;
//  int location[n], stype[n];
//  findLocation(n, location0, location, stype);
//  for(int i = 0; i < n; i++) cout << location[i] << " \n"[i == (n - 1)];
//  for(int i = 0; i < n; i++) cout << stype[i] << " \n"[i == (n - 1)];
//  return 0;
//}

• Subtask 1: 8 / 8
• Subtask 2: 22 / 22
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44