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답안 #832173

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
832173 2023-08-21T05:42:27 Z arush_agu Mergers (JOI19_mergers) C++17
70 / 100
 382 ms 145500 KB 
#include <algorithm>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

#ifdef DEBUG
#include <time.h>
#endif

#define all(a) (a).begin(), (a).end()
#define rev(a) (a).rbegin(), (a).rend()
#define F first
#define S second
int recur_depth = 0;
#ifdef DEBUG
#define dbg(x)                                                                 \
  {                                                                            \
    ++recur_depth;                                                             \
    auto x_ = x;                                                               \
    --recur_depth;                                                             \
    cerr << string(recur_depth, '\t') << "\e[91m" << __func__ << ":"           \
         << __LINE__ << "\t" << #x << " = " << x_ << "\e[39m" << endl;         \
  }
#else
#define dbg(x)
#endif

using namespace std;
using namespace __gnu_pbds;

typedef pair<int, int> ii;

typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> llll;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pair<int, int>> vii;
typedef vector<vii> vvii;

typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pair<ll, ll>> vll;
typedef vector<vll> vvll;

typedef vector<bool> vb;

template <class type1>
using ordered_set = tree<type1, null_type, less<type1>, rb_tree_tag,
                         tree_order_statistics_node_update>;

template <typename A, typename B>
ostream &operator<<(ostream &os, const pair<A, B> &p) {
  return os << '(' << p.first << ", " << p.second << ')';
}
template <typename T_container, typename T = typename enable_if<
                                    !is_same<T_container, string>::value,
                                    typename T_container::value_type>::type>
ostream &operator<<(ostream &os, const T_container &v) {
  os << '{';
  string sep;
  for (const T &x : v)
    os << sep << x, sep = ", ";
  return os << '}';
}

const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
const ll INF = 1e9;
const ld EPS = 1e-9;

const int MAXN = 5e5 + 1;
const int MAXLG = 20;

ll state[MAXN], first_occ[MAXN], cnt[MAXN];
ii st[MAXLG][MAXN];
vi adj[MAXN], by_state[MAXN];
ll b[MAXN], sub_sz[MAXN];

int log2_floor(unsigned long long i) {
  return i ? __builtin_clzll(1) - __builtin_clzll(i) : -1;
}

struct ST {
  int n;

  ST(int n) : n(n) {
    for (int j = 1; j < MAXLG; j++)
      for (int i = 0; i + (1 << j) <= n; i++)
        st[j][i] = min(st[j - 1][i], st[j - 1][i + (1 << (j - 1))]);
  }

  int query(int l, int r) {
    if (l > r)
      swap(l, r);
    int k = log2_floor(r - l + 1);
    return min(st[k][l], st[k][r - (1 << k) + 1]).second;
  }
};

void solve() {
  int n, k;
  cin >> n >> k;
  for (int i = 0; i < n - 1; i++) {
    int u, v;
    cin >> u >> v;
    u--, v--;
    adj[u].push_back(v);
    adj[v].push_back(u);
  }
  for (int i = 0; i < n; i++)
    cin >> state[i], state[i]--;

  int timer = 0;
  function<void(int, int, int)> f = [&](int u, int p, int d) {
    first_occ[u] = timer;
    st[0][timer++] = {d, u};
    for (int &v : adj[u])
      if (v != p) {
        f(v, u, d + 1);
        st[0][timer++] = {d, u};
      }
  };
  f(0, -1, 0);

  ST lc(timer);

  for (int i = 0; i < n; i++)
    by_state[state[i]].push_back(i);

  for (int i = 0; i < k; i++) {
    int lca = by_state[i][0];
    for (int &u : by_state[i])
      lca = lc.query(first_occ[lca], first_occ[u]);
    b[lca] += by_state[i].size();
  }

  int cc = 0;
  function<void(int, int)> g = [&](int u, int p) {
    sub_sz[u] = 1;
    for (int &v : adj[u])
      if (v != p) {
        g(v, u);
        sub_sz[u] += sub_sz[v];
      }
    sub_sz[u] -= b[u];
    if (!sub_sz[u])
      cc++;
  };
  g(0, -1);

  if (cc == 1) {
    cout << "0\n";
    return;
  }

  int no_leaves = 0;
  function<void(int, int, int)> h = [&](int u, int p, int curr) {
    if (sub_sz[u] == 0 && curr != u)
      cnt[u]++, cnt[curr]++, curr = u;
    for (int &v : adj[u])
      if (v != p)
        h(v, u, curr);
    if (cnt[u] == 1)
      no_leaves++;
  };

  h(0, -1, 0);
  cout << (no_leaves + 1) / 2 << '\n';
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);

  clock_t start = clock();

  int test_cases = 1;
  // cin >> test_cases;

  while (test_cases--)
    solve();

#ifdef DEBUG
  cerr << fixed << setprecision(10)
       << "\nTime Taken: " << (double)(clock() - start) / CLOCKS_PER_SEC
       << "s\n";
#endif
  return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:196:11: warning: unused variable 'start' [-Wunused-variable]
  196 |   clock_t start = clock();
      |           ^~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 11 ms 23808 KB Output is correct
3 Correct 11 ms 23920 KB Output is correct
4 Correct 11 ms 23804 KB Output is correct
5 Correct 10 ms 23860 KB Output is correct
6 Correct 10 ms 23892 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23920 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 10 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23860 KB Output is correct
13 Correct 10 ms 23764 KB Output is correct
14 Correct 11 ms 23892 KB Output is correct
15 Correct 10 ms 23868 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 10 ms 23892 KB Output is correct
19 Correct 11 ms 23872 KB Output is correct
20 Correct 11 ms 23772 KB Output is correct
21 Correct 10 ms 23892 KB Output is correct
22 Correct 11 ms 23816 KB Output is correct
23 Correct 10 ms 23872 KB Output is correct
24 Correct 10 ms 23872 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 11 ms 23808 KB Output is correct
3 Correct 11 ms 23920 KB Output is correct
4 Correct 11 ms 23804 KB Output is correct
5 Correct 10 ms 23860 KB Output is correct
6 Correct 10 ms 23892 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23920 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 10 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23860 KB Output is correct
13 Correct 10 ms 23764 KB Output is correct
14 Correct 11 ms 23892 KB Output is correct
15 Correct 10 ms 23868 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 10 ms 23892 KB Output is correct
19 Correct 11 ms 23872 KB Output is correct
20 Correct 11 ms 23772 KB Output is correct
21 Correct 10 ms 23892 KB Output is correct
22 Correct 11 ms 23816 KB Output is correct
23 Correct 10 ms 23872 KB Output is correct
24 Correct 10 ms 23872 KB Output is correct
25 Correct 12 ms 23892 KB Output is correct
26 Correct 12 ms 24656 KB Output is correct
27 Correct 12 ms 24660 KB Output is correct
28 Correct 12 ms 24964 KB Output is correct
29 Correct 12 ms 24788 KB Output is correct
30 Correct 12 ms 24660 KB Output is correct
31 Correct 10 ms 23892 KB Output is correct
32 Correct 11 ms 24916 KB Output is correct
33 Correct 10 ms 23892 KB Output is correct
34 Correct 12 ms 24620 KB Output is correct
35 Correct 12 ms 24816 KB Output is correct
36 Correct 13 ms 24732 KB Output is correct
37 Correct 13 ms 24760 KB Output is correct
38 Correct 11 ms 23820 KB Output is correct
39 Correct 12 ms 24652 KB Output is correct
40 Correct 12 ms 24660 KB Output is correct
41 Correct 12 ms 24660 KB Output is correct
42 Correct 12 ms 24660 KB Output is correct
43 Correct 12 ms 24916 KB Output is correct
44 Correct 10 ms 23832 KB Output is correct
45 Correct 13 ms 24788 KB Output is correct
46 Correct 12 ms 24768 KB Output is correct
47 Correct 11 ms 23916 KB Output is correct
48 Correct 12 ms 24684 KB Output is correct
49 Correct 12 ms 24704 KB Output is correct
50 Correct 13 ms 24808 KB Output is correct
51 Correct 12 ms 24624 KB Output is correct
52 Correct 12 ms 24700 KB Output is correct
53 Correct 12 ms 24744 KB Output is correct
54 Correct 11 ms 24660 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 11 ms 23808 KB Output is correct
3 Correct 11 ms 23920 KB Output is correct
4 Correct 11 ms 23804 KB Output is correct
5 Correct 10 ms 23860 KB Output is correct
6 Correct 10 ms 23892 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23920 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 10 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23860 KB Output is correct
13 Correct 10 ms 23764 KB Output is correct
14 Correct 11 ms 23892 KB Output is correct
15 Correct 10 ms 23868 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 10 ms 23892 KB Output is correct
19 Correct 11 ms 23872 KB Output is correct
20 Correct 11 ms 23772 KB Output is correct
21 Correct 10 ms 23892 KB Output is correct
22 Correct 11 ms 23816 KB Output is correct
23 Correct 10 ms 23872 KB Output is correct
24 Correct 10 ms 23872 KB Output is correct
25 Correct 10 ms 23848 KB Output is correct
26 Correct 53 ms 56552 KB Output is correct
27 Correct 65 ms 56212 KB Output is correct
28 Correct 12 ms 24660 KB Output is correct
29 Correct 11 ms 23880 KB Output is correct
30 Correct 10 ms 23912 KB Output is correct
31 Correct 73 ms 56512 KB Output is correct
32 Correct 11 ms 24660 KB Output is correct
33 Correct 72 ms 66232 KB Output is correct
34 Correct 69 ms 56316 KB Output is correct
35 Correct 12 ms 24672 KB Output is correct
36 Correct 70 ms 57556 KB Output is correct
37 Correct 12 ms 24660 KB Output is correct
38 Correct 12 ms 24660 KB Output is correct
39 Correct 54 ms 56408 KB Output is correct
40 Correct 12 ms 25012 KB Output is correct
41 Correct 65 ms 56200 KB Output is correct
42 Correct 74 ms 59552 KB Output is correct
43 Correct 11 ms 23892 KB Output is correct
44 Correct 69 ms 66688 KB Output is correct
45 Correct 72 ms 61436 KB Output is correct
46 Correct 12 ms 24660 KB Output is correct
47 Correct 12 ms 24700 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 53 ms 56544 KB Output is correct
2 Correct 63 ms 60656 KB Output is correct
3 Correct 13 ms 24656 KB Output is correct
4 Correct 14 ms 24764 KB Output is correct
5 Correct 11 ms 23892 KB Output is correct
6 Correct 11 ms 23892 KB Output is correct
7 Correct 12 ms 24616 KB Output is correct
8 Correct 81 ms 58728 KB Output is correct
9 Correct 13 ms 24652 KB Output is correct
10 Correct 73 ms 57736 KB Output is correct
11 Correct 11 ms 23876 KB Output is correct
12 Correct 74 ms 57728 KB Output is correct
13 Correct 84 ms 58756 KB Output is correct
14 Correct 80 ms 60356 KB Output is correct
15 Correct 53 ms 56452 KB Output is correct
16 Correct 13 ms 24672 KB Output is correct
17 Correct 11 ms 23892 KB Output is correct
18 Correct 67 ms 60444 KB Output is correct
19 Correct 89 ms 65884 KB Output is correct
20 Correct 13 ms 24660 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 63 ms 59044 KB Output is correct
23 Correct 12 ms 24660 KB Output is correct
24 Correct 86 ms 58068 KB Output is correct
25 Correct 84 ms 64020 KB Output is correct
26 Correct 13 ms 24820 KB Output is correct
27 Correct 12 ms 24772 KB Output is correct
28 Correct 13 ms 24712 KB Output is correct
29 Correct 12 ms 24660 KB Output is correct
30 Correct 15 ms 24712 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 11 ms 23808 KB Output is correct
3 Correct 11 ms 23920 KB Output is correct
4 Correct 11 ms 23804 KB Output is correct
5 Correct 10 ms 23860 KB Output is correct
6 Correct 10 ms 23892 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23920 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 10 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23860 KB Output is correct
13 Correct 10 ms 23764 KB Output is correct
14 Correct 11 ms 23892 KB Output is correct
15 Correct 10 ms 23868 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 10 ms 23892 KB Output is correct
19 Correct 11 ms 23872 KB Output is correct
20 Correct 11 ms 23772 KB Output is correct
21 Correct 10 ms 23892 KB Output is correct
22 Correct 11 ms 23816 KB Output is correct
23 Correct 10 ms 23872 KB Output is correct
24 Correct 10 ms 23872 KB Output is correct
25 Correct 12 ms 23892 KB Output is correct
26 Correct 12 ms 24656 KB Output is correct
27 Correct 12 ms 24660 KB Output is correct
28 Correct 12 ms 24964 KB Output is correct
29 Correct 12 ms 24788 KB Output is correct
30 Correct 12 ms 24660 KB Output is correct
31 Correct 10 ms 23892 KB Output is correct
32 Correct 11 ms 24916 KB Output is correct
33 Correct 10 ms 23892 KB Output is correct
34 Correct 12 ms 24620 KB Output is correct
35 Correct 12 ms 24816 KB Output is correct
36 Correct 13 ms 24732 KB Output is correct
37 Correct 13 ms 24760 KB Output is correct
38 Correct 11 ms 23820 KB Output is correct
39 Correct 12 ms 24652 KB Output is correct
40 Correct 12 ms 24660 KB Output is correct
41 Correct 12 ms 24660 KB Output is correct
42 Correct 12 ms 24660 KB Output is correct
43 Correct 12 ms 24916 KB Output is correct
44 Correct 10 ms 23832 KB Output is correct
45 Correct 13 ms 24788 KB Output is correct
46 Correct 12 ms 24768 KB Output is correct
47 Correct 11 ms 23916 KB Output is correct
48 Correct 12 ms 24684 KB Output is correct
49 Correct 12 ms 24704 KB Output is correct
50 Correct 13 ms 24808 KB Output is correct
51 Correct 12 ms 24624 KB Output is correct
52 Correct 12 ms 24700 KB Output is correct
53 Correct 12 ms 24744 KB Output is correct
54 Correct 11 ms 24660 KB Output is correct
55 Correct 10 ms 23848 KB Output is correct
56 Correct 53 ms 56552 KB Output is correct
57 Correct 65 ms 56212 KB Output is correct
58 Correct 12 ms 24660 KB Output is correct
59 Correct 11 ms 23880 KB Output is correct
60 Correct 10 ms 23912 KB Output is correct
61 Correct 73 ms 56512 KB Output is correct
62 Correct 11 ms 24660 KB Output is correct
63 Correct 72 ms 66232 KB Output is correct
64 Correct 69 ms 56316 KB Output is correct
65 Correct 12 ms 24672 KB Output is correct
66 Correct 70 ms 57556 KB Output is correct
67 Correct 12 ms 24660 KB Output is correct
68 Correct 12 ms 24660 KB Output is correct
69 Correct 54 ms 56408 KB Output is correct
70 Correct 12 ms 25012 KB Output is correct
71 Correct 65 ms 56200 KB Output is correct
72 Correct 74 ms 59552 KB Output is correct
73 Correct 11 ms 23892 KB Output is correct
74 Correct 69 ms 66688 KB Output is correct
75 Correct 72 ms 61436 KB Output is correct
76 Correct 12 ms 24660 KB Output is correct
77 Correct 12 ms 24700 KB Output is correct
78 Correct 53 ms 56544 KB Output is correct
79 Correct 63 ms 60656 KB Output is correct
80 Correct 13 ms 24656 KB Output is correct
81 Correct 14 ms 24764 KB Output is correct
82 Correct 11 ms 23892 KB Output is correct
83 Correct 11 ms 23892 KB Output is correct
84 Correct 12 ms 24616 KB Output is correct
85 Correct 81 ms 58728 KB Output is correct
86 Correct 13 ms 24652 KB Output is correct
87 Correct 73 ms 57736 KB Output is correct
88 Correct 11 ms 23876 KB Output is correct
89 Correct 74 ms 57728 KB Output is correct
90 Correct 84 ms 58756 KB Output is correct
91 Correct 80 ms 60356 KB Output is correct
92 Correct 53 ms 56452 KB Output is correct
93 Correct 13 ms 24672 KB Output is correct
94 Correct 11 ms 23892 KB Output is correct
95 Correct 67 ms 60444 KB Output is correct
96 Correct 89 ms 65884 KB Output is correct
97 Correct 13 ms 24660 KB Output is correct
98 Correct 12 ms 23892 KB Output is correct
99 Correct 63 ms 59044 KB Output is correct
100 Correct 12 ms 24660 KB Output is correct
101 Correct 86 ms 58068 KB Output is correct
102 Correct 84 ms 64020 KB Output is correct
103 Correct 13 ms 24820 KB Output is correct
104 Correct 12 ms 24772 KB Output is correct
105 Correct 13 ms 24712 KB Output is correct
106 Correct 12 ms 24660 KB Output is correct
107 Correct 15 ms 24712 KB Output is correct
108 Incorrect 382 ms 145500 KB Output isn't correct
109 Halted 0 ms 0 KB -