oj.uz

답안 #740832

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
740832 2023-05-13T07:15:35 Z josanneo22 수도 (JOI20_capital_city) C++17
100 / 100
 249 ms 52824 KB 
#include<bits/stdc++.h> 
using namespace std; 
typedef long long ll;

const int N = 2e5 + 7;
vector <int> g[N],gr[N],rg[N],t;
int c[N],sz[N],cmp[N],bad[N];
bool used[N],ok[N];
 
void add(int u, int v) {
    gr[u].push_back(v);
    rg[v].push_back(u);
} 
int tin[N], tout[N];
 
int timer = 0;
 
void init(int u, int p) {
  tin[u] = timer++;
  for (auto v : g[u]) {
    if (v != p) {
      init(v, u);
    }
  }
  tout[u] = timer++;
}
 
bool anc(int a, int b) {
  return tin[a] <= tin[b] && tout[b] <= tout[a];
}
 
void dfs(int u, int p = -1) {
  if (u != bad[c[u]]) {
    add(c[u], c[p]);
  }
  for (auto v : g[u]) {
    if (v != p) {
      dfs(v, u);
    }
  }
}
 
void get_topsort(int u) {
  used[u] = true;
  for (auto v : gr[u]) {
    if (!used[v]) {
      get_topsort(v);
    }
  }
  t.push_back(u);
}
 
int cnt = 0;
 
void jhfs(int u) {
  used[u] = true;
  cmp[u] = cnt;
  ++sz[cnt];
  for (auto v : rg[u]) {
    if (!used[v]) {
      jhfs(v);
    }
  }
}
 
int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    int n, k; cin >> n >> k;
    for (int i = 0; i + 1 < n; ++i) {
        int u, v;
        cin >> u >> v;
        --u, --v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    vector <vector <int>> who(k);
    for (int i = 0; i < n; ++i) {
        cin >> c[i];
        --c[i];
        who[c[i]].push_back(i);
    }
    init(0, -1); 
    for (int i = 0; i < k; ++i) {
        int v = who[i].front();
        for (auto w : who[i])
            if (anc(w, v)) 
                v = w; 
        bool ok = true;
        for (auto w : who[i]) ok &= anc(v, w); 

        if (ok) bad[i] = v;
        else bad[i] = -1;
    }
    dfs(0);
    for (int i = 0; i < k; ++i) {
        if (!used[i]) get_topsort(i); 
    }
    reverse(t.begin(), t.end());
    fill(used, used + k, false);   
    for (int u : t) {
        if (!used[u]) {
            jhfs(u);
            ++cnt;
        }
    }
    fill(ok, ok + cnt, true);
    for (int i = 0; i < k; ++i) {
        for (int j : gr[i]) {
            if (cmp[i] != cmp[j]) {
                ok[cmp[i]] = false;
            }
        }
    }
    int ans = n;
    for (int i = 0; i < cnt; ++i) {
        if (ok[i]) ans = min(ans, sz[i]);
    }
    cout << ans - 1 << '\n';
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 11 ms 14412 KB Output is correct
4 Correct 10 ms 14424 KB Output is correct
5 Correct 9 ms 14460 KB Output is correct
6 Correct 8 ms 14464 KB Output is correct
7 Correct 8 ms 14420 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14424 KB Output is correct
10 Correct 27 ms 14360 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 11 ms 14412 KB Output is correct
4 Correct 10 ms 14424 KB Output is correct
5 Correct 9 ms 14460 KB Output is correct
6 Correct 8 ms 14464 KB Output is correct
7 Correct 8 ms 14420 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14424 KB Output is correct
10 Correct 27 ms 14360 KB Output is correct
11 Correct 10 ms 14544 KB Output is correct
12 Correct 12 ms 14668 KB Output is correct
13 Correct 11 ms 14616 KB Output is correct
14 Correct 9 ms 14524 KB Output is correct
15 Correct 10 ms 14708 KB Output is correct
16 Correct 9 ms 14676 KB Output is correct
17 Correct 9 ms 14676 KB Output is correct
18 Correct 9 ms 14676 KB Output is correct
19 Correct 9 ms 14676 KB Output is correct
20 Correct 11 ms 14648 KB Output is correct
21 Correct 8 ms 14676 KB Output is correct
22 Correct 10 ms 14820 KB Output is correct
23 Correct 10 ms 14704 KB Output is correct
24 Correct 12 ms 14676 KB Output is correct
25 Correct 12 ms 14696 KB Output is correct
26 Correct 11 ms 14676 KB Output is correct
27 Correct 13 ms 14676 KB Output is correct
28 Correct 9 ms 14676 KB Output is correct
29 Correct 11 ms 14696 KB Output is correct
30 Correct 9 ms 14760 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 203 ms 52516 KB Output is correct
2 Correct 119 ms 52748 KB Output is correct
3 Correct 227 ms 52228 KB Output is correct
4 Correct 114 ms 52824 KB Output is correct
5 Correct 205 ms 49020 KB Output is correct
6 Correct 111 ms 52676 KB Output is correct
7 Correct 204 ms 48772 KB Output is correct
8 Correct 161 ms 51024 KB Output is correct
9 Correct 189 ms 43692 KB Output is correct
10 Correct 213 ms 41600 KB Output is correct
11 Correct 237 ms 44024 KB Output is correct
12 Correct 176 ms 46152 KB Output is correct
13 Correct 187 ms 41364 KB Output is correct
14 Correct 168 ms 46396 KB Output is correct
15 Correct 201 ms 46156 KB Output is correct
16 Correct 235 ms 42096 KB Output is correct
17 Correct 245 ms 42568 KB Output is correct
18 Correct 220 ms 42816 KB Output is correct
19 Correct 191 ms 45352 KB Output is correct
20 Correct 171 ms 47048 KB Output is correct
21 Correct 8 ms 14420 KB Output is correct

Subtask #4
59.0 / 59.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 11 ms 14412 KB Output is correct
4 Correct 10 ms 14424 KB Output is correct
5 Correct 9 ms 14460 KB Output is correct
6 Correct 8 ms 14464 KB Output is correct
7 Correct 8 ms 14420 KB Output is correct
8 Correct 8 ms 14420 KB Output is correct
9 Correct 8 ms 14424 KB Output is correct
10 Correct 27 ms 14360 KB Output is correct
11 Correct 10 ms 14544 KB Output is correct
12 Correct 12 ms 14668 KB Output is correct
13 Correct 11 ms 14616 KB Output is correct
14 Correct 9 ms 14524 KB Output is correct
15 Correct 10 ms 14708 KB Output is correct
16 Correct 9 ms 14676 KB Output is correct
17 Correct 9 ms 14676 KB Output is correct
18 Correct 9 ms 14676 KB Output is correct
19 Correct 9 ms 14676 KB Output is correct
20 Correct 11 ms 14648 KB Output is correct
21 Correct 8 ms 14676 KB Output is correct
22 Correct 10 ms 14820 KB Output is correct
23 Correct 10 ms 14704 KB Output is correct
24 Correct 12 ms 14676 KB Output is correct
25 Correct 12 ms 14696 KB Output is correct
26 Correct 11 ms 14676 KB Output is correct
27 Correct 13 ms 14676 KB Output is correct
28 Correct 9 ms 14676 KB Output is correct
29 Correct 11 ms 14696 KB Output is correct
30 Correct 9 ms 14760 KB Output is correct
31 Correct 203 ms 52516 KB Output is correct
32 Correct 119 ms 52748 KB Output is correct
33 Correct 227 ms 52228 KB Output is correct
34 Correct 114 ms 52824 KB Output is correct
35 Correct 205 ms 49020 KB Output is correct
36 Correct 111 ms 52676 KB Output is correct
37 Correct 204 ms 48772 KB Output is correct
38 Correct 161 ms 51024 KB Output is correct
39 Correct 189 ms 43692 KB Output is correct
40 Correct 213 ms 41600 KB Output is correct
41 Correct 237 ms 44024 KB Output is correct
42 Correct 176 ms 46152 KB Output is correct
43 Correct 187 ms 41364 KB Output is correct
44 Correct 168 ms 46396 KB Output is correct
45 Correct 201 ms 46156 KB Output is correct
46 Correct 235 ms 42096 KB Output is correct
47 Correct 245 ms 42568 KB Output is correct
48 Correct 220 ms 42816 KB Output is correct
49 Correct 191 ms 45352 KB Output is correct
50 Correct 171 ms 47048 KB Output is correct
51 Correct 8 ms 14420 KB Output is correct
52 Correct 211 ms 32784 KB Output is correct
53 Correct 212 ms 32644 KB Output is correct
54 Correct 222 ms 32652 KB Output is correct
55 Correct 216 ms 32780 KB Output is correct
56 Correct 195 ms 32760 KB Output is correct
57 Correct 249 ms 32716 KB Output is correct
58 Correct 212 ms 38984 KB Output is correct
59 Correct 201 ms 39636 KB Output is correct
60 Correct 205 ms 39268 KB Output is correct
61 Correct 227 ms 39096 KB Output is correct
62 Correct 108 ms 52804 KB Output is correct
63 Correct 115 ms 52748 KB Output is correct
64 Correct 150 ms 51340 KB Output is correct
65 Correct 149 ms 52748 KB Output is correct
66 Correct 168 ms 40464 KB Output is correct
67 Correct 157 ms 40384 KB Output is correct
68 Correct 155 ms 40332 KB Output is correct
69 Correct 143 ms 40376 KB Output is correct
70 Correct 163 ms 40264 KB Output is correct
71 Correct 188 ms 40336 KB Output is correct
72 Correct 168 ms 40364 KB Output is correct
73 Correct 181 ms 39784 KB Output is correct
74 Correct 141 ms 40440 KB Output is correct
75 Correct 151 ms 40312 KB Output is correct
76 Correct 208 ms 44868 KB Output is correct
77 Correct 200 ms 43368 KB Output is correct
78 Correct 185 ms 42620 KB Output is correct
79 Correct 177 ms 40848 KB Output is correct
80 Correct 193 ms 46520 KB Output is correct
81 Correct 218 ms 43796 KB Output is correct
82 Correct 201 ms 43932 KB Output is correct
83 Correct 243 ms 41240 KB Output is correct
84 Correct 215 ms 46048 KB Output is correct
85 Correct 228 ms 44728 KB Output is correct
86 Correct 209 ms 40904 KB Output is correct
87 Correct 190 ms 42288 KB Output is correct
88 Correct 209 ms 42908 KB Output is correct
89 Correct 192 ms 39760 KB Output is correct
90 Correct 172 ms 39528 KB Output is correct
91 Correct 221 ms 41380 KB Output is correct
92 Correct 184 ms 40528 KB Output is correct
93 Correct 166 ms 40076 KB Output is correct
94 Correct 168 ms 39548 KB Output is correct
95 Correct 179 ms 40820 KB Output is correct
96 Correct 175 ms 39824 KB Output is correct
97 Correct 172 ms 41500 KB Output is correct