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답안 #832172

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
832172 2023-08-21T05:41:01 Z arush_agu Mergers (JOI19_mergers) C++17
70 / 100
 364 ms 139672 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;

int 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 10 ms 23764 KB Output is correct
2 Correct 12 ms 23892 KB Output is correct
3 Correct 11 ms 23892 KB Output is correct
4 Correct 11 ms 23764 KB Output is correct
5 Correct 10 ms 23804 KB Output is correct
6 Correct 10 ms 23884 KB Output is correct
7 Correct 13 ms 23824 KB Output is correct
8 Correct 11 ms 23852 KB Output is correct
9 Correct 11 ms 23864 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23892 KB Output is correct
13 Correct 12 ms 23844 KB Output is correct
14 Correct 11 ms 23916 KB Output is correct
15 Correct 11 ms 23892 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23756 KB Output is correct
18 Correct 11 ms 23912 KB Output is correct
19 Correct 11 ms 23856 KB Output is correct
20 Correct 11 ms 23764 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 10 ms 23892 KB Output is correct
23 Correct 10 ms 23764 KB Output is correct
24 Correct 11 ms 23764 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 12 ms 23892 KB Output is correct
3 Correct 11 ms 23892 KB Output is correct
4 Correct 11 ms 23764 KB Output is correct
5 Correct 10 ms 23804 KB Output is correct
6 Correct 10 ms 23884 KB Output is correct
7 Correct 13 ms 23824 KB Output is correct
8 Correct 11 ms 23852 KB Output is correct
9 Correct 11 ms 23864 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23892 KB Output is correct
13 Correct 12 ms 23844 KB Output is correct
14 Correct 11 ms 23916 KB Output is correct
15 Correct 11 ms 23892 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23756 KB Output is correct
18 Correct 11 ms 23912 KB Output is correct
19 Correct 11 ms 23856 KB Output is correct
20 Correct 11 ms 23764 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 10 ms 23892 KB Output is correct
23 Correct 10 ms 23764 KB Output is correct
24 Correct 11 ms 23764 KB Output is correct
25 Correct 10 ms 23880 KB Output is correct
26 Correct 11 ms 24660 KB Output is correct
27 Correct 12 ms 24624 KB Output is correct
28 Correct 14 ms 24916 KB Output is correct
29 Correct 12 ms 24684 KB Output is correct
30 Correct 13 ms 24660 KB Output is correct
31 Correct 11 ms 23892 KB Output is correct
32 Correct 11 ms 24916 KB Output is correct
33 Correct 10 ms 23864 KB Output is correct
34 Correct 12 ms 24596 KB Output is correct
35 Correct 12 ms 24660 KB Output is correct
36 Correct 12 ms 24660 KB Output is correct
37 Correct 13 ms 24604 KB Output is correct
38 Correct 11 ms 23896 KB Output is correct
39 Correct 12 ms 24660 KB Output is correct
40 Correct 13 ms 24576 KB Output is correct
41 Correct 14 ms 24660 KB Output is correct
42 Correct 13 ms 24660 KB Output is correct
43 Correct 12 ms 24888 KB Output is correct
44 Correct 11 ms 23876 KB Output is correct
45 Correct 12 ms 24712 KB Output is correct
46 Correct 13 ms 24716 KB Output is correct
47 Correct 11 ms 23856 KB Output is correct
48 Correct 13 ms 24660 KB Output is correct
49 Correct 12 ms 24660 KB Output is correct
50 Correct 12 ms 24788 KB Output is correct
51 Correct 12 ms 24660 KB Output is correct
52 Correct 12 ms 24596 KB Output is correct
53 Correct 12 ms 24660 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 10 ms 23764 KB Output is correct
2 Correct 12 ms 23892 KB Output is correct
3 Correct 11 ms 23892 KB Output is correct
4 Correct 11 ms 23764 KB Output is correct
5 Correct 10 ms 23804 KB Output is correct
6 Correct 10 ms 23884 KB Output is correct
7 Correct 13 ms 23824 KB Output is correct
8 Correct 11 ms 23852 KB Output is correct
9 Correct 11 ms 23864 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23892 KB Output is correct
13 Correct 12 ms 23844 KB Output is correct
14 Correct 11 ms 23916 KB Output is correct
15 Correct 11 ms 23892 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23756 KB Output is correct
18 Correct 11 ms 23912 KB Output is correct
19 Correct 11 ms 23856 KB Output is correct
20 Correct 11 ms 23764 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 10 ms 23892 KB Output is correct
23 Correct 10 ms 23764 KB Output is correct
24 Correct 11 ms 23764 KB Output is correct
25 Correct 11 ms 23824 KB Output is correct
26 Correct 52 ms 55688 KB Output is correct
27 Correct 71 ms 55404 KB Output is correct
28 Correct 12 ms 24660 KB Output is correct
29 Correct 11 ms 23908 KB Output is correct
30 Correct 11 ms 23892 KB Output is correct
31 Correct 75 ms 55716 KB Output is correct
32 Correct 12 ms 24660 KB Output is correct
33 Correct 72 ms 65440 KB Output is correct
34 Correct 74 ms 55476 KB Output is correct
35 Correct 12 ms 24660 KB Output is correct
36 Correct 70 ms 56780 KB Output is correct
37 Correct 12 ms 24660 KB Output is correct
38 Correct 12 ms 24648 KB Output is correct
39 Correct 53 ms 55652 KB Output is correct
40 Correct 13 ms 24916 KB Output is correct
41 Correct 66 ms 55368 KB Output is correct
42 Correct 70 ms 58672 KB Output is correct
43 Correct 11 ms 23892 KB Output is correct
44 Correct 69 ms 65872 KB Output is correct
45 Correct 64 ms 60620 KB Output is correct
46 Correct 13 ms 24660 KB Output is correct
47 Correct 12 ms 24660 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 53 ms 55680 KB Output is correct
2 Correct 63 ms 59408 KB Output is correct
3 Correct 12 ms 24660 KB Output is correct
4 Correct 12 ms 24668 KB Output is correct
5 Correct 11 ms 23856 KB Output is correct
6 Correct 11 ms 23892 KB Output is correct
7 Correct 13 ms 24608 KB Output is correct
8 Correct 83 ms 57656 KB Output is correct
9 Correct 13 ms 24660 KB Output is correct
10 Correct 92 ms 56652 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 84 ms 56724 KB Output is correct
13 Correct 82 ms 57568 KB Output is correct
14 Correct 82 ms 59084 KB Output is correct
15 Correct 53 ms 55712 KB Output is correct
16 Correct 13 ms 24660 KB Output is correct
17 Correct 11 ms 23892 KB Output is correct
18 Correct 64 ms 59084 KB Output is correct
19 Correct 97 ms 64688 KB Output is correct
20 Correct 12 ms 24660 KB Output is correct
21 Correct 11 ms 23916 KB Output is correct
22 Correct 62 ms 57844 KB Output is correct
23 Correct 13 ms 24660 KB Output is correct
24 Correct 80 ms 56908 KB Output is correct
25 Correct 83 ms 62860 KB Output is correct
26 Correct 12 ms 24772 KB Output is correct
27 Correct 12 ms 24772 KB Output is correct
28 Correct 12 ms 24660 KB Output is correct
29 Correct 13 ms 24660 KB Output is correct
30 Correct 14 ms 24808 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 12 ms 23892 KB Output is correct
3 Correct 11 ms 23892 KB Output is correct
4 Correct 11 ms 23764 KB Output is correct
5 Correct 10 ms 23804 KB Output is correct
6 Correct 10 ms 23884 KB Output is correct
7 Correct 13 ms 23824 KB Output is correct
8 Correct 11 ms 23852 KB Output is correct
9 Correct 11 ms 23864 KB Output is correct
10 Correct 11 ms 23764 KB Output is correct
11 Correct 11 ms 23892 KB Output is correct
12 Correct 11 ms 23892 KB Output is correct
13 Correct 12 ms 23844 KB Output is correct
14 Correct 11 ms 23916 KB Output is correct
15 Correct 11 ms 23892 KB Output is correct
16 Correct 11 ms 23764 KB Output is correct
17 Correct 11 ms 23756 KB Output is correct
18 Correct 11 ms 23912 KB Output is correct
19 Correct 11 ms 23856 KB Output is correct
20 Correct 11 ms 23764 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 10 ms 23892 KB Output is correct
23 Correct 10 ms 23764 KB Output is correct
24 Correct 11 ms 23764 KB Output is correct
25 Correct 10 ms 23880 KB Output is correct
26 Correct 11 ms 24660 KB Output is correct
27 Correct 12 ms 24624 KB Output is correct
28 Correct 14 ms 24916 KB Output is correct
29 Correct 12 ms 24684 KB Output is correct
30 Correct 13 ms 24660 KB Output is correct
31 Correct 11 ms 23892 KB Output is correct
32 Correct 11 ms 24916 KB Output is correct
33 Correct 10 ms 23864 KB Output is correct
34 Correct 12 ms 24596 KB Output is correct
35 Correct 12 ms 24660 KB Output is correct
36 Correct 12 ms 24660 KB Output is correct
37 Correct 13 ms 24604 KB Output is correct
38 Correct 11 ms 23896 KB Output is correct
39 Correct 12 ms 24660 KB Output is correct
40 Correct 13 ms 24576 KB Output is correct
41 Correct 14 ms 24660 KB Output is correct
42 Correct 13 ms 24660 KB Output is correct
43 Correct 12 ms 24888 KB Output is correct
44 Correct 11 ms 23876 KB Output is correct
45 Correct 12 ms 24712 KB Output is correct
46 Correct 13 ms 24716 KB Output is correct
47 Correct 11 ms 23856 KB Output is correct
48 Correct 13 ms 24660 KB Output is correct
49 Correct 12 ms 24660 KB Output is correct
50 Correct 12 ms 24788 KB Output is correct
51 Correct 12 ms 24660 KB Output is correct
52 Correct 12 ms 24596 KB Output is correct
53 Correct 12 ms 24660 KB Output is correct
54 Correct 11 ms 24660 KB Output is correct
55 Correct 11 ms 23824 KB Output is correct
56 Correct 52 ms 55688 KB Output is correct
57 Correct 71 ms 55404 KB Output is correct
58 Correct 12 ms 24660 KB Output is correct
59 Correct 11 ms 23908 KB Output is correct
60 Correct 11 ms 23892 KB Output is correct
61 Correct 75 ms 55716 KB Output is correct
62 Correct 12 ms 24660 KB Output is correct
63 Correct 72 ms 65440 KB Output is correct
64 Correct 74 ms 55476 KB Output is correct
65 Correct 12 ms 24660 KB Output is correct
66 Correct 70 ms 56780 KB Output is correct
67 Correct 12 ms 24660 KB Output is correct
68 Correct 12 ms 24648 KB Output is correct
69 Correct 53 ms 55652 KB Output is correct
70 Correct 13 ms 24916 KB Output is correct
71 Correct 66 ms 55368 KB Output is correct
72 Correct 70 ms 58672 KB Output is correct
73 Correct 11 ms 23892 KB Output is correct
74 Correct 69 ms 65872 KB Output is correct
75 Correct 64 ms 60620 KB Output is correct
76 Correct 13 ms 24660 KB Output is correct
77 Correct 12 ms 24660 KB Output is correct
78 Correct 53 ms 55680 KB Output is correct
79 Correct 63 ms 59408 KB Output is correct
80 Correct 12 ms 24660 KB Output is correct
81 Correct 12 ms 24668 KB Output is correct
82 Correct 11 ms 23856 KB Output is correct
83 Correct 11 ms 23892 KB Output is correct
84 Correct 13 ms 24608 KB Output is correct
85 Correct 83 ms 57656 KB Output is correct
86 Correct 13 ms 24660 KB Output is correct
87 Correct 92 ms 56652 KB Output is correct
88 Correct 11 ms 23892 KB Output is correct
89 Correct 84 ms 56724 KB Output is correct
90 Correct 82 ms 57568 KB Output is correct
91 Correct 82 ms 59084 KB Output is correct
92 Correct 53 ms 55712 KB Output is correct
93 Correct 13 ms 24660 KB Output is correct
94 Correct 11 ms 23892 KB Output is correct
95 Correct 64 ms 59084 KB Output is correct
96 Correct 97 ms 64688 KB Output is correct
97 Correct 12 ms 24660 KB Output is correct
98 Correct 11 ms 23916 KB Output is correct
99 Correct 62 ms 57844 KB Output is correct
100 Correct 13 ms 24660 KB Output is correct
101 Correct 80 ms 56908 KB Output is correct
102 Correct 83 ms 62860 KB Output is correct
103 Correct 12 ms 24772 KB Output is correct
104 Correct 12 ms 24772 KB Output is correct
105 Correct 12 ms 24660 KB Output is correct
106 Correct 13 ms 24660 KB Output is correct
107 Correct 14 ms 24808 KB Output is correct
108 Incorrect 364 ms 139672 KB Output isn't correct
109 Halted 0 ms 0 KB -