oj.uz

Submission #387822

# Submission time Handle Problem Language Result Execution time Memory
387822 2021-04-09T08:56:43 Z WLZ Stations (IOI20_stations) C++14
0 / 100
 3000 ms 2097156 KB 
#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

int dfs_cnt = 0;
vector< vector<int> > g;
vector<int> d, dfs_in, dfs_out;

void dfs(int u, int p) {
  dfs_in[u] = dfs_cnt++;
  for (auto& v : g[u]) {
    if (v != p) {
      d[v] = d[u] + 1;
      dfs(v, u);
    }
  }
  dfs_out[u] = dfs_cnt++;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
  g.resize(n);
  d.assign(n, 0);
  dfs_in.resize(n); dfs_out.resize(n);
  for (int i = 0; i < n - 1; i++) {
    g[u[i]].push_back(v[i]);
    g[v[i]].push_back(u[i]);
  }
  dfs(0, -1);
  set<int> st;
  for (int i = 0; i < n; i++) {
    if (d[i] % 2 == 0) st.insert(dfs_in[i]);
    else st.insert(dfs_out[i]);
  }
  int cur = 0;
  map<int, int> mp;
  for (auto& x : st) mp[x] = cur++;
  vector<int> ans(n);
  for (int i = 0; i < n; i++) {
    if (d[i] % 2 == 0) ans[i] = mp[dfs_in[i]];
    else ans[i] = mp[dfs_out[i]];
  }
  return ans;
}

int find_next_station(int s, int t, vector<int> c) {
  for (auto& x : c) if (x == t) return t;
  sort(c.begin(), c.end());
  if (s < c[0]) { // in
    for (int i = 0; i < (int) c.size() - 1; i++) if (s < t && t < c[i]) return c[i];
    return c.back();
  } else { // out
    for (int i = (int) c.size() - 1; i >= 1; i--) if (c[i] < t && t < s) return c[i];
    return c[0];
  }
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 416 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3066 ms 1628 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 1941 ms 2097156 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 867 ms 492 KB Output is correct
2 Runtime error 1195 ms 2097156 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3009 ms 2097156 KB Time limit exceeded
2 Halted 0 ms 0 KB -