Submission #50255

#	Time	Username	Problem	Language	Result	Execution time	Memory
50255		mirbek01	Rail (IOI14_rail)	C++17	30 / 100	630 ms	98736 KiB

rail

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

using namespace std;

const int N = 5e3 + 2;

int dist[N][N], used[N];

void findLocation(int N, int first, int location[], int stype[]){
      location[0] = first;
      stype[0] = 1;
      if(N <= 1) return ;
      for(int i = 0; i < N; i ++){
            for(int j = i + 1; j < N; j ++){
                  dist[i][j] = dist[j][i] = getDistance(i, j);
            }
      }
      vector <int> rd, lc;
      int a = 1, b = 0;
      for(int i = 2; i < N; i ++){
            if(dist[0][i] < dist[0][a])
                  a = i;
      }
      rd.push_back(a);
      for(int i = 1; i < N; i ++){
            if(i == a) continue;
            if(dist[a][i] < dist[a][b])
                  b = i;
      }
      if(b){
            used[b] = 1;
            stype[b] = 1;
            location[b] = (location[0] + dist[0][a]) - dist[a][b];
      }
      for(int i = 1; i < N; i ++){
            if(i == a || i == b) continue;
            int x = dist[0][i], c = dist[a][i], d = dist[a][b], mn = dist[0][a];
            if(x - mn == c - d * 2)
                  rd.push_back(i);
            if(x - mn == c)
                  lc.push_back(i);
      }
      for(int i : rd){
            location[i] = dist[0][i] + first;
            stype[i] = 2;
            used[i] = 1;
      }
      for(int i : lc){
            location[i] = location[a] - dist[a][i];
            stype[i] = 1;
            used[i] = 1;
      }
      for(int i = 1; i < N; i ++){
            if(!used[i]){
                  for(int j : rd){
                        int x = dist[0][j], y = dist[j][i], z = dist[0][i];
                        if(z - y == x){
                              stype[i] = 1;
                              location[i] = location[j] - y;
                              used[i] = 1;
                        }
                  }
            }
      }
      for(int i = 1; i < N; i ++){
            if(!used[i]){
                  int id = 0;
                  for(int j = 0; j < N; j ++){
                        if(j == i) continue;
                        if(dist[i][j] < dist[i][id])
                              id = j;
                  }
                  stype[i] = 2;
                  location[i] = location[id] + dist[i][id];
            }
      }
}

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