#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define all(x) (x).begin(),(x).end()
#define X first
#define Y second
#define sep ' '
#define endl '\n'
#define debug(x) cerr << #x << ": " << x << endl;
const ll MAXN = 1e6 + 10;
int D[MAXN], dp[MAXN], n, d;
vector<int> adj[MAXN];
// check n == 1
void dfs(int v, int p) {
if (adj[v].size() == 1 && p) {
D[v] = 0;
dp[v] = 1;
return;
}
D[v] = MAXN;
int mn = MAXN, mx = -1;
for (int u : adj[v]) {
if (u == p) continue;
dfs(u, v);
int td = D[u] + 1;
if (2 * td >= d) {
mn = min(mn, td);
dp[v] += dp[u];
D[v] = min(D[v], td);
} else {
dp[v] += dp[u] - 1;
mx = max(mx, td);
}
}
if (mx > -1 && mx + mn >= d) {
dp[v]++;
D[v] = min(D[v], mx);
}
if (D[v] >= d) dp[v]++, D[v] = 0;
}
int main() {
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin >> n >> d;
if (n == 1) return cout << 1 << endl, 0;
for (int i = 1; i < n; i++) {
int v;
cin >> v;
adj[i + 1].push_back(v + 1);
adj[v + 1].push_back(i + 1);
}
dfs(1, 0);
cout << dp[1] << endl;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
12 ms |
23820 KB |
Output is correct |
2 |
Correct |
14 ms |
23820 KB |
Output is correct |
3 |
Correct |
14 ms |
23812 KB |
Output is correct |
4 |
Correct |
13 ms |
23748 KB |
Output is correct |
5 |
Correct |
13 ms |
23728 KB |
Output is correct |
6 |
Correct |
13 ms |
23764 KB |
Output is correct |
7 |
Correct |
13 ms |
23764 KB |
Output is correct |
8 |
Correct |
15 ms |
23812 KB |
Output is correct |
9 |
Correct |
14 ms |
23764 KB |
Output is correct |
10 |
Correct |
13 ms |
23816 KB |
Output is correct |
11 |
Correct |
16 ms |
23824 KB |
Output is correct |
12 |
Correct |
13 ms |
23720 KB |
Output is correct |
13 |
Correct |
13 ms |
23828 KB |
Output is correct |
14 |
Correct |
14 ms |
23764 KB |
Output is correct |
15 |
Correct |
13 ms |
23820 KB |
Output is correct |
16 |
Correct |
13 ms |
23764 KB |
Output is correct |
17 |
Correct |
13 ms |
23764 KB |
Output is correct |
18 |
Correct |
13 ms |
23796 KB |
Output is correct |
19 |
Correct |
13 ms |
23764 KB |
Output is correct |
20 |
Correct |
13 ms |
23816 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
12 ms |
23820 KB |
Output is correct |
2 |
Correct |
14 ms |
23820 KB |
Output is correct |
3 |
Correct |
14 ms |
23812 KB |
Output is correct |
4 |
Correct |
13 ms |
23748 KB |
Output is correct |
5 |
Correct |
13 ms |
23728 KB |
Output is correct |
6 |
Correct |
13 ms |
23764 KB |
Output is correct |
7 |
Correct |
13 ms |
23764 KB |
Output is correct |
8 |
Correct |
15 ms |
23812 KB |
Output is correct |
9 |
Correct |
14 ms |
23764 KB |
Output is correct |
10 |
Correct |
13 ms |
23816 KB |
Output is correct |
11 |
Correct |
16 ms |
23824 KB |
Output is correct |
12 |
Correct |
13 ms |
23720 KB |
Output is correct |
13 |
Correct |
13 ms |
23828 KB |
Output is correct |
14 |
Correct |
14 ms |
23764 KB |
Output is correct |
15 |
Correct |
13 ms |
23820 KB |
Output is correct |
16 |
Correct |
13 ms |
23764 KB |
Output is correct |
17 |
Correct |
13 ms |
23764 KB |
Output is correct |
18 |
Correct |
13 ms |
23796 KB |
Output is correct |
19 |
Correct |
13 ms |
23764 KB |
Output is correct |
20 |
Correct |
13 ms |
23816 KB |
Output is correct |
21 |
Correct |
14 ms |
23964 KB |
Output is correct |
22 |
Correct |
14 ms |
23768 KB |
Output is correct |
23 |
Correct |
13 ms |
23812 KB |
Output is correct |
24 |
Correct |
13 ms |
23764 KB |
Output is correct |
25 |
Correct |
14 ms |
23764 KB |
Output is correct |
26 |
Correct |
14 ms |
23764 KB |
Output is correct |
27 |
Correct |
15 ms |
23764 KB |
Output is correct |
28 |
Correct |
13 ms |
23860 KB |
Output is correct |
29 |
Correct |
13 ms |
23892 KB |
Output is correct |
30 |
Correct |
13 ms |
23820 KB |
Output is correct |
31 |
Correct |
17 ms |
23768 KB |
Output is correct |
32 |
Correct |
13 ms |
23892 KB |
Output is correct |
33 |
Correct |
15 ms |
23840 KB |
Output is correct |
34 |
Correct |
15 ms |
23892 KB |
Output is correct |
35 |
Correct |
14 ms |
23892 KB |
Output is correct |
36 |
Correct |
13 ms |
23892 KB |
Output is correct |
37 |
Correct |
13 ms |
23876 KB |
Output is correct |
38 |
Correct |
15 ms |
23920 KB |
Output is correct |
39 |
Correct |
13 ms |
23904 KB |
Output is correct |
40 |
Correct |
13 ms |
23948 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
12 ms |
23820 KB |
Output is correct |
2 |
Correct |
14 ms |
23820 KB |
Output is correct |
3 |
Correct |
14 ms |
23812 KB |
Output is correct |
4 |
Correct |
13 ms |
23748 KB |
Output is correct |
5 |
Correct |
13 ms |
23728 KB |
Output is correct |
6 |
Correct |
13 ms |
23764 KB |
Output is correct |
7 |
Correct |
13 ms |
23764 KB |
Output is correct |
8 |
Correct |
15 ms |
23812 KB |
Output is correct |
9 |
Correct |
14 ms |
23764 KB |
Output is correct |
10 |
Correct |
13 ms |
23816 KB |
Output is correct |
11 |
Correct |
16 ms |
23824 KB |
Output is correct |
12 |
Correct |
13 ms |
23720 KB |
Output is correct |
13 |
Correct |
13 ms |
23828 KB |
Output is correct |
14 |
Correct |
14 ms |
23764 KB |
Output is correct |
15 |
Correct |
13 ms |
23820 KB |
Output is correct |
16 |
Correct |
13 ms |
23764 KB |
Output is correct |
17 |
Correct |
13 ms |
23764 KB |
Output is correct |
18 |
Correct |
13 ms |
23796 KB |
Output is correct |
19 |
Correct |
13 ms |
23764 KB |
Output is correct |
20 |
Correct |
13 ms |
23816 KB |
Output is correct |
21 |
Correct |
14 ms |
23964 KB |
Output is correct |
22 |
Correct |
14 ms |
23768 KB |
Output is correct |
23 |
Correct |
13 ms |
23812 KB |
Output is correct |
24 |
Correct |
13 ms |
23764 KB |
Output is correct |
25 |
Correct |
14 ms |
23764 KB |
Output is correct |
26 |
Correct |
14 ms |
23764 KB |
Output is correct |
27 |
Correct |
15 ms |
23764 KB |
Output is correct |
28 |
Correct |
13 ms |
23860 KB |
Output is correct |
29 |
Correct |
13 ms |
23892 KB |
Output is correct |
30 |
Correct |
13 ms |
23820 KB |
Output is correct |
31 |
Correct |
17 ms |
23768 KB |
Output is correct |
32 |
Correct |
13 ms |
23892 KB |
Output is correct |
33 |
Correct |
15 ms |
23840 KB |
Output is correct |
34 |
Correct |
15 ms |
23892 KB |
Output is correct |
35 |
Correct |
14 ms |
23892 KB |
Output is correct |
36 |
Correct |
13 ms |
23892 KB |
Output is correct |
37 |
Correct |
13 ms |
23876 KB |
Output is correct |
38 |
Correct |
15 ms |
23920 KB |
Output is correct |
39 |
Correct |
13 ms |
23904 KB |
Output is correct |
40 |
Correct |
13 ms |
23948 KB |
Output is correct |
41 |
Correct |
62 ms |
32392 KB |
Output is correct |
42 |
Correct |
39 ms |
28364 KB |
Output is correct |
43 |
Correct |
46 ms |
28364 KB |
Output is correct |
44 |
Correct |
42 ms |
28364 KB |
Output is correct |
45 |
Correct |
60 ms |
28376 KB |
Output is correct |
46 |
Correct |
129 ms |
32972 KB |
Output is correct |
47 |
Correct |
89 ms |
33008 KB |
Output is correct |
48 |
Correct |
91 ms |
32944 KB |
Output is correct |
49 |
Correct |
92 ms |
33008 KB |
Output is correct |
50 |
Correct |
35 ms |
28640 KB |
Output is correct |
51 |
Correct |
32 ms |
28536 KB |
Output is correct |
52 |
Correct |
29 ms |
28628 KB |
Output is correct |
53 |
Correct |
43 ms |
33360 KB |
Output is correct |
54 |
Correct |
43 ms |
33348 KB |
Output is correct |
55 |
Correct |
45 ms |
33356 KB |
Output is correct |
56 |
Correct |
14 ms |
23912 KB |
Output is correct |
57 |
Correct |
18 ms |
26324 KB |
Output is correct |
58 |
Correct |
36 ms |
35272 KB |
Output is correct |
59 |
Correct |
85 ms |
40656 KB |
Output is correct |
60 |
Correct |
61 ms |
32576 KB |
Output is correct |
61 |
Correct |
66 ms |
32332 KB |
Output is correct |