#include <bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for (int i = a; i < b; ++i)
#define per(i, a, b) for (int i = b - 1; i >= a; --i)
#define trav(x, a) for (auto& x : a)
#define sz(a) a.size()
typedef pair<int, int> ii;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
vi graph[200001];
int d, x;
map<int, int> memo[200001];
void add(map<int, int>& mp, int dep, int val) {
vi rem;
auto it = mp.lower_bound(dep);
if (it != mp.end()) {
if (val <= it->second) return;
if (it->first == dep) ++it;
}
while (it != mp.begin()) {
--it;
if (val < it->second) break;
rem.push_back(it->first);
}
trav(depth, rem) mp.erase(depth);
mp.emplace(dep, val);
}
void dp(int u, int depth) {
map<int, int>& curr = memo[u];
curr.emplace(depth, 1);
trav(v, graph[u]) {
dp(v, depth + 1);
map<int, int>& prev = memo[v];
if (sz(curr) < sz(prev)) swap(curr, prev);
auto next = curr;
trav(item, prev) {
int dep, val;
tie(dep, val) = item;
auto it = curr.lower_bound(depth * 2 + d - dep);
if (it != curr.end()) {
x = u;
add(next, min(dep, it->first), val + it->second);
}
}
trav(item, prev) {
int dep, val;
tie(dep, val) = item;
add(next, dep, val);
}
curr.swap(next);
memo[v].clear();
}
}
int main() {
cin.tie(0)->sync_with_stdio(0);
int n, p;
cin >> n >> d;
d = min(d, n);
rep(i, 1, n) {
cin >> p;
graph[p].push_back(i);
}
dp(0, 0);
cout << memo[0].begin()->second << endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
10 ms |
14284 KB |
Output is correct |
2 |
Correct |
9 ms |
14284 KB |
Output is correct |
3 |
Correct |
9 ms |
14412 KB |
Output is correct |
4 |
Correct |
10 ms |
14336 KB |
Output is correct |
5 |
Correct |
10 ms |
14284 KB |
Output is correct |
6 |
Correct |
10 ms |
14480 KB |
Output is correct |
7 |
Correct |
9 ms |
14408 KB |
Output is correct |
8 |
Correct |
9 ms |
14380 KB |
Output is correct |
9 |
Correct |
9 ms |
14352 KB |
Output is correct |
10 |
Correct |
10 ms |
14412 KB |
Output is correct |
11 |
Correct |
9 ms |
14404 KB |
Output is correct |
12 |
Correct |
10 ms |
14412 KB |
Output is correct |
13 |
Correct |
9 ms |
14412 KB |
Output is correct |
14 |
Correct |
11 ms |
14356 KB |
Output is correct |
15 |
Correct |
9 ms |
14408 KB |
Output is correct |
16 |
Correct |
9 ms |
14412 KB |
Output is correct |
17 |
Correct |
9 ms |
14400 KB |
Output is correct |
18 |
Correct |
9 ms |
14404 KB |
Output is correct |
19 |
Correct |
9 ms |
14412 KB |
Output is correct |
20 |
Correct |
10 ms |
14392 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
10 ms |
14284 KB |
Output is correct |
2 |
Correct |
9 ms |
14284 KB |
Output is correct |
3 |
Correct |
9 ms |
14412 KB |
Output is correct |
4 |
Correct |
10 ms |
14336 KB |
Output is correct |
5 |
Correct |
10 ms |
14284 KB |
Output is correct |
6 |
Correct |
10 ms |
14480 KB |
Output is correct |
7 |
Correct |
9 ms |
14408 KB |
Output is correct |
8 |
Correct |
9 ms |
14380 KB |
Output is correct |
9 |
Correct |
9 ms |
14352 KB |
Output is correct |
10 |
Correct |
10 ms |
14412 KB |
Output is correct |
11 |
Correct |
9 ms |
14404 KB |
Output is correct |
12 |
Correct |
10 ms |
14412 KB |
Output is correct |
13 |
Correct |
9 ms |
14412 KB |
Output is correct |
14 |
Correct |
11 ms |
14356 KB |
Output is correct |
15 |
Correct |
9 ms |
14408 KB |
Output is correct |
16 |
Correct |
9 ms |
14412 KB |
Output is correct |
17 |
Correct |
9 ms |
14400 KB |
Output is correct |
18 |
Correct |
9 ms |
14404 KB |
Output is correct |
19 |
Correct |
9 ms |
14412 KB |
Output is correct |
20 |
Correct |
10 ms |
14392 KB |
Output is correct |
21 |
Correct |
10 ms |
14740 KB |
Output is correct |
22 |
Correct |
10 ms |
14408 KB |
Output is correct |
23 |
Correct |
9 ms |
14412 KB |
Output is correct |
24 |
Correct |
10 ms |
14316 KB |
Output is correct |
25 |
Correct |
10 ms |
14408 KB |
Output is correct |
26 |
Correct |
10 ms |
14408 KB |
Output is correct |
27 |
Correct |
10 ms |
14412 KB |
Output is correct |
28 |
Correct |
10 ms |
14412 KB |
Output is correct |
29 |
Correct |
10 ms |
14412 KB |
Output is correct |
30 |
Correct |
10 ms |
14412 KB |
Output is correct |
31 |
Correct |
10 ms |
14412 KB |
Output is correct |
32 |
Correct |
10 ms |
14408 KB |
Output is correct |
33 |
Correct |
10 ms |
14416 KB |
Output is correct |
34 |
Correct |
10 ms |
14412 KB |
Output is correct |
35 |
Correct |
10 ms |
14412 KB |
Output is correct |
36 |
Correct |
10 ms |
14412 KB |
Output is correct |
37 |
Correct |
11 ms |
14412 KB |
Output is correct |
38 |
Correct |
10 ms |
14412 KB |
Output is correct |
39 |
Correct |
10 ms |
14540 KB |
Output is correct |
40 |
Correct |
18 ms |
14796 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
10 ms |
14284 KB |
Output is correct |
2 |
Correct |
9 ms |
14284 KB |
Output is correct |
3 |
Correct |
9 ms |
14412 KB |
Output is correct |
4 |
Correct |
10 ms |
14336 KB |
Output is correct |
5 |
Correct |
10 ms |
14284 KB |
Output is correct |
6 |
Correct |
10 ms |
14480 KB |
Output is correct |
7 |
Correct |
9 ms |
14408 KB |
Output is correct |
8 |
Correct |
9 ms |
14380 KB |
Output is correct |
9 |
Correct |
9 ms |
14352 KB |
Output is correct |
10 |
Correct |
10 ms |
14412 KB |
Output is correct |
11 |
Correct |
9 ms |
14404 KB |
Output is correct |
12 |
Correct |
10 ms |
14412 KB |
Output is correct |
13 |
Correct |
9 ms |
14412 KB |
Output is correct |
14 |
Correct |
11 ms |
14356 KB |
Output is correct |
15 |
Correct |
9 ms |
14408 KB |
Output is correct |
16 |
Correct |
9 ms |
14412 KB |
Output is correct |
17 |
Correct |
9 ms |
14400 KB |
Output is correct |
18 |
Correct |
9 ms |
14404 KB |
Output is correct |
19 |
Correct |
9 ms |
14412 KB |
Output is correct |
20 |
Correct |
10 ms |
14392 KB |
Output is correct |
21 |
Correct |
10 ms |
14740 KB |
Output is correct |
22 |
Correct |
10 ms |
14408 KB |
Output is correct |
23 |
Correct |
9 ms |
14412 KB |
Output is correct |
24 |
Correct |
10 ms |
14316 KB |
Output is correct |
25 |
Correct |
10 ms |
14408 KB |
Output is correct |
26 |
Correct |
10 ms |
14408 KB |
Output is correct |
27 |
Correct |
10 ms |
14412 KB |
Output is correct |
28 |
Correct |
10 ms |
14412 KB |
Output is correct |
29 |
Correct |
10 ms |
14412 KB |
Output is correct |
30 |
Correct |
10 ms |
14412 KB |
Output is correct |
31 |
Correct |
10 ms |
14412 KB |
Output is correct |
32 |
Correct |
10 ms |
14408 KB |
Output is correct |
33 |
Correct |
10 ms |
14416 KB |
Output is correct |
34 |
Correct |
10 ms |
14412 KB |
Output is correct |
35 |
Correct |
10 ms |
14412 KB |
Output is correct |
36 |
Correct |
10 ms |
14412 KB |
Output is correct |
37 |
Correct |
11 ms |
14412 KB |
Output is correct |
38 |
Correct |
10 ms |
14412 KB |
Output is correct |
39 |
Correct |
10 ms |
14540 KB |
Output is correct |
40 |
Correct |
18 ms |
14796 KB |
Output is correct |
41 |
Correct |
80 ms |
18368 KB |
Output is correct |
42 |
Correct |
76 ms |
16184 KB |
Output is correct |
43 |
Incorrect |
54 ms |
16196 KB |
Output isn't correct |
44 |
Halted |
0 ms |
0 KB |
- |