oj.uz

Submission #41906

# Submission time Handle Problem Language Result Execution time Memory
41906 2018-02-22T05:50:24 Z funcsr Towns (IOI15_towns) C++14
0 / 100
 14 ms 8620 KB 
#include "towns.h"
#include <vector>
#include <iostream>
#include <algorithm>
#include <queue>
#include <cassert>
#include <set>
using namespace std;
typedef pair<int, int> P;
#define rep(i, n) for (int i=0; i<(n); i++)
#define pb push_back
#define _1 first
#define _2 second
#define INF 1145141919
#define MOD 1000000007
#define all(x) x.begin(), x.end()
#define uniq(x) x.erase(unique(all(x)), x.end())

//#define MAX_V 300
#define MAX_V 1000
int dist[MAX_V][MAX_V];

vector<P> G[MAX_V];
int dfs(int x, int p, int r) {
  int ret = r;
  for (P pp : G[x]) if (pp._1 != p) {
    int t = pp._1, len = pp._2;
    ret = max(ret, dfs(t, x, r+len));
  }
  return ret;
}

int hubDistance(int N, int sub) {
  rep(i, MAX_V) rep(j, MAX_V) dist[i][j] = 0;
  rep(i, N) rep(j, i) dist[i][j] = dist[j][i] = getDistance(i, j);
  set<int> nokori;
  rep(i, N) nokori.insert(i);
  int V = N;

  while (nokori.size() >= 2) {
    int u = *nokori.begin();
    vector<int> rs;
    rs.pb(u);
    if (nokori.size() > 2) {
      for (int v : nokori) if (u != v) {
        int l = dist[u][v];
        vector<int> vs;
        for (int x : nokori) if (x != u && x != v) vs.pb(dist[x][u]-dist[x][v]);
        bool same = true;
        for (int x : vs) if (x != vs[0]) same = false;
        if (same) rs.pb(v);
      }
    }
    else {
      rs.pb(*nokori.rbegin());
    }
    assert(rs.size() >= 2);
    //cout<<"{";for (int x : rs)cout<<x<<",";cout<<"}\n";
    int x0 = rs[0], x1 = rs[1];
    for (int x : rs) nokori.erase(x);
    if (nokori.empty()) assert(rs.size() >= 3);
    int tekitou = -1;
    if (nokori.empty()) tekitou = rs[2];
    else tekitou = *nokori.begin();
    int sum = dist[x0][x1], diff = dist[x0][tekitou] - dist[x1][tekitou];
    int a = (sum+diff)/2;
    int root = V++;
    G[root].pb(P(x0, a));
    G[x0].pb(P(root, a));
    dist[x0][root] = dist[root][x0] = a;
    for (int x : rs) if (x != x0) {
      int d = dist[x0][x] - a;
      dist[x][root] = dist[root][x] = d;
      G[root].pb(P(x, d));
      G[x].pb(P(root, d));
    }
    for (int x : nokori) dist[root][x] = dist[x][root] = dist[x0][x] - a;
    nokori.insert(root);
    assert(V <= MAX_V);
  }
  return 0;
  rep(i, V) sort(all(G[i])), uniq(G[i]);
  rep(i, N) assert(G[i].size() == 1);
  rep(i, V) if (i >= N) assert(G[i].size() >= 3);
  rep(x, V) {
    for (P pp : G[x]) {
      int t = pp._1, len = pp._2;
      cout<<x<<"->"<<t<<": "<<len<<"\n";
    }
  }
  int R = INF;
  rep(i, V) {
    R = min(R, dfs(i, -1, 0));
  }
  return R;
}

Compilation message

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:46:13: warning: unused variable 'l' [-Wunused-variable]
         int l = dist[u][v];
             ^
towns.cpp: At global scope:
towns.cpp:33:28: warning: unused parameter 'sub' [-Wunused-parameter]
 int hubDistance(int N, int sub) {
                            ^

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Runtime error 14 ms 8440 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 8440 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Runtime error 10 ms 8620 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 8620 KB Output isn't correct

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Runtime error 9 ms 8620 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #6
0 / 39.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 8620 KB Output isn't correct
2 Halted 0 ms 0 KB -