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Submission #292712

# Submission time Handle Problem Language Result Execution time Memory
292712 2020-09-07T12:10:28 Z Haunted_Cpp Simurgh (IOI17_simurgh) C++17
51 / 100
 251 ms 4224 KB 
#include "simurgh.h"
#include <bits/stdc++.h>
using namespace std;

const int MAX_N = 240 + 5;

vector<vector<pair<int, int>>> g(MAX_N);
bitset<MAX_N> vis;
bitset<MAX_N * MAX_N> invalid;
bitset<MAX_N * MAX_N> is_op;
vector<int> span, par, s, best_way, u, v;

int n;

void reset() {
  for (int i = 0; i < n; i++) {
    par[i] = i;
    s[i] = 1;
  }
}

int root(int x) {
  if (x == par[x]) return x;
  return par[x] = root(par[x]);
}

void join(int a, int b) {
  a = root(a);
  b = root(b);
  if (a == b) return;
  if (s[a] < s[b]) swap(a, b);
  par[b] = a;
  s[a] += s[b];
}

bool is(int a, int b) {
  return root(a) == root(b);
}

bool works() {
  for (auto to : span) {
    const int st = u[to];
    const int et = v[to];
    if (is(st, et)) return false;
    join(st, et);
  }
  return true;
}

void get_any(int node) {
  vis[node] = 1;
  for (auto [nxt, to] : g[node]) {
    if (!vis[nxt]) {
      vis[nxt] = 1;
      span.emplace_back(to);
      get_any(nxt);
    }
  }  
}

vector<int> find_roads(int n, vector<int> u, vector<int> v) {
  ::n = n;
  ::u = u;
  ::v = v;
  const int m = v.size();
  const int t = n - 1;
  par = s = vector<int>(n);
  for (int i = 0; i < m; i++) {
    const int st = u[i];
    const int et = v[i];
    g[st].emplace_back(et, i);
    g[et].emplace_back(st, i);
  }
  get_any(0);
  int score = count_common_roads(span);
  if (score == t) {
    return span;
  }
  for (auto &edge : span) {
    int starting_edge = edge;
    bool swap = false;
    reset();
    best_way.clear();
    for (auto add_back : span) {
      if (add_back == edge) continue;
      join(u[add_back], v[add_back]);
    }
    for (int i = 0; i < m; i++) {
      const int st = u[i];
      const int et = v[i];
      if (is(st, et) == false && !invalid[i]) {
        best_way.emplace_back(i);
      }
    }
    //~ for (auto to : 
    vector<pair<int, int>> sc;
    for (auto i : best_way) {
      edge = i;
      assert(!invalid[i]);
      int nxt_score = count_common_roads(span);
      sc.emplace_back(edge, nxt_score);
      if (nxt_score > score) {
        score = nxt_score;
        swap = true;
        break;
      }
      if (nxt_score < score) {
        invalid[i] = 1;
      }
    }
    if (score == t) {
      return span;
    }
    if (!swap) {
      edge = starting_edge;
      for (auto [nxt, res] : sc) {
        if (res < score) {
          invalid[nxt] = 1;
        }
      }
    } else {
      for (auto [nxt, res] : sc) {
        if (res <= score) {
          invalid[nxt] = 1;
        }
      }
    }
  }
  return span;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Correct 0 ms 384 KB correct
4 Correct 0 ms 384 KB correct
5 Correct 1 ms 288 KB correct
6 Correct 1 ms 384 KB correct
7 Correct 0 ms 256 KB correct
8 Correct 0 ms 384 KB correct
9 Correct 1 ms 384 KB correct
10 Correct 0 ms 384 KB correct
11 Correct 0 ms 256 KB correct
12 Correct 0 ms 384 KB correct
13 Correct 0 ms 384 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Correct 0 ms 384 KB correct
4 Correct 0 ms 384 KB correct
5 Correct 1 ms 288 KB correct
6 Correct 1 ms 384 KB correct
7 Correct 0 ms 256 KB correct
8 Correct 0 ms 384 KB correct
9 Correct 1 ms 384 KB correct
10 Correct 0 ms 384 KB correct
11 Correct 0 ms 256 KB correct
12 Correct 0 ms 384 KB correct
13 Correct 0 ms 384 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 3 ms 416 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 3 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 3 ms 384 KB correct
20 Correct 3 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 1 ms 384 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 2 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 2 ms 384 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Correct 0 ms 384 KB correct
4 Correct 0 ms 384 KB correct
5 Correct 1 ms 288 KB correct
6 Correct 1 ms 384 KB correct
7 Correct 0 ms 256 KB correct
8 Correct 0 ms 384 KB correct
9 Correct 1 ms 384 KB correct
10 Correct 0 ms 384 KB correct
11 Correct 0 ms 256 KB correct
12 Correct 0 ms 384 KB correct
13 Correct 0 ms 384 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 3 ms 416 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 3 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 3 ms 384 KB correct
20 Correct 3 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 1 ms 384 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 2 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 2 ms 384 KB correct
34 Correct 236 ms 1536 KB correct
35 Correct 251 ms 1784 KB correct
36 Correct 166 ms 1532 KB correct
37 Correct 13 ms 384 KB correct
38 Correct 247 ms 1912 KB correct
39 Correct 221 ms 1788 KB correct
40 Correct 170 ms 1408 KB correct
41 Correct 218 ms 1820 KB correct
42 Correct 237 ms 1916 KB correct
43 Correct 133 ms 1280 KB correct
44 Correct 104 ms 1016 KB correct
45 Correct 121 ms 1024 KB correct
46 Correct 93 ms 896 KB correct
47 Correct 44 ms 640 KB correct
48 Correct 6 ms 416 KB correct
49 Correct 15 ms 384 KB correct
50 Correct 45 ms 640 KB correct
51 Correct 120 ms 1144 KB correct
52 Correct 106 ms 896 KB correct
53 Correct 91 ms 896 KB correct
54 Correct 127 ms 1400 KB correct
55 Correct 124 ms 1024 KB correct
56 Correct 123 ms 1024 KB correct
57 Correct 124 ms 1024 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 1 ms 384 KB correct
3 Runtime error 24 ms 4224 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Correct 0 ms 384 KB correct
4 Correct 0 ms 384 KB correct
5 Correct 1 ms 288 KB correct
6 Correct 1 ms 384 KB correct
7 Correct 0 ms 256 KB correct
8 Correct 0 ms 384 KB correct
9 Correct 1 ms 384 KB correct
10 Correct 0 ms 384 KB correct
11 Correct 0 ms 256 KB correct
12 Correct 0 ms 384 KB correct
13 Correct 0 ms 384 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 3 ms 416 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 3 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 3 ms 384 KB correct
20 Correct 3 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 1 ms 384 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 2 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 2 ms 384 KB correct
34 Correct 236 ms 1536 KB correct
35 Correct 251 ms 1784 KB correct
36 Correct 166 ms 1532 KB correct
37 Correct 13 ms 384 KB correct
38 Correct 247 ms 1912 KB correct
39 Correct 221 ms 1788 KB correct
40 Correct 170 ms 1408 KB correct
41 Correct 218 ms 1820 KB correct
42 Correct 237 ms 1916 KB correct
43 Correct 133 ms 1280 KB correct
44 Correct 104 ms 1016 KB correct
45 Correct 121 ms 1024 KB correct
46 Correct 93 ms 896 KB correct
47 Correct 44 ms 640 KB correct
48 Correct 6 ms 416 KB correct
49 Correct 15 ms 384 KB correct
50 Correct 45 ms 640 KB correct
51 Correct 120 ms 1144 KB correct
52 Correct 106 ms 896 KB correct
53 Correct 91 ms 896 KB correct
54 Correct 127 ms 1400 KB correct
55 Correct 124 ms 1024 KB correct
56 Correct 123 ms 1024 KB correct
57 Correct 124 ms 1024 KB correct
58 Correct 1 ms 384 KB correct
59 Correct 1 ms 384 KB correct
60 Runtime error 24 ms 4224 KB Execution killed with signal 11
61 Halted 0 ms 0 KB -