#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
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) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 2e5+3, oo = 1e9;
int choice[mxN],d[mxN],N,D, minput[mxN];
vi adj[mxN], ans;
void dfs(int at, int from) {
choice[at]=at;
minput[at]=oo;
for(int to : adj[at]) if(to!=from) {
d[to] = d[at]+1;
dfs(to,at);
minput[at] = min(minput[at],minput[to]+1);
if(choice[to]) {
if((d[choice[to]]-d[at])*2>=D) {
ans.push_back(choice[to]);
minput[at] = min(minput[at], d[choice[to]]-d[at]);
} else if(d[choice[to]]>d[choice[at]]) {
choice[at] = choice[to];
}
}
}
int got = d[choice[at]]-d[at];
if(got+minput[at]<D) {
choice[at]=0;
}
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> N >> D;
for(int i=2;i<=N;++i) {
int x; cin >> x;
adj[x+1].push_back(i);
}
dfs(1,0);
if(choice[1]) ans.push_back(choice[1]);
cout << ans.size() << '\n'; //<< ans << '\n';
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 4 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 5 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 6 |
Correct |
2 ms |
5028 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
4 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4968 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4948 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 4 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 5 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 6 |
Correct |
2 ms |
5028 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
4 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4968 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 21 |
Correct |
3 ms |
5204 KB |
Output is correct |
| 22 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 23 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 24 |
Correct |
4 ms |
5032 KB |
Output is correct |
| 25 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 26 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 27 |
Correct |
3 ms |
5028 KB |
Output is correct |
| 28 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 29 |
Correct |
3 ms |
5004 KB |
Output is correct |
| 30 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 31 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 32 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 33 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 34 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 35 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 37 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 39 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 40 |
Correct |
3 ms |
5204 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 4 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 5 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 6 |
Correct |
2 ms |
5028 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
4 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4968 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 21 |
Correct |
3 ms |
5204 KB |
Output is correct |
| 22 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 23 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 24 |
Correct |
4 ms |
5032 KB |
Output is correct |
| 25 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 26 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 27 |
Correct |
3 ms |
5028 KB |
Output is correct |
| 28 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 29 |
Correct |
3 ms |
5004 KB |
Output is correct |
| 30 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 31 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 32 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 33 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 34 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 35 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 37 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 39 |
Correct |
3 ms |
5032 KB |
Output is correct |
| 40 |
Correct |
3 ms |
5204 KB |
Output is correct |
| 41 |
Correct |
31 ms |
12448 KB |
Output is correct |
| 42 |
Correct |
24 ms |
8912 KB |
Output is correct |
| 43 |
Correct |
22 ms |
8276 KB |
Output is correct |
| 44 |
Correct |
25 ms |
8368 KB |
Output is correct |
| 45 |
Correct |
23 ms |
8276 KB |
Output is correct |
| 46 |
Correct |
68 ms |
12384 KB |
Output is correct |
| 47 |
Correct |
71 ms |
11668 KB |
Output is correct |
| 48 |
Correct |
55 ms |
11748 KB |
Output is correct |
| 49 |
Correct |
55 ms |
11644 KB |
Output is correct |
| 50 |
Correct |
12 ms |
7092 KB |
Output is correct |
| 51 |
Correct |
13 ms |
7100 KB |
Output is correct |
| 52 |
Correct |
13 ms |
7100 KB |
Output is correct |
| 53 |
Correct |
23 ms |
9268 KB |
Output is correct |
| 54 |
Correct |
23 ms |
9216 KB |
Output is correct |
| 55 |
Correct |
25 ms |
9216 KB |
Output is correct |
| 56 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 57 |
Correct |
7 ms |
7892 KB |
Output is correct |
| 58 |
Correct |
25 ms |
17972 KB |
Output is correct |
| 59 |
Correct |
45 ms |
21120 KB |
Output is correct |
| 60 |
Correct |
32 ms |
12968 KB |
Output is correct |
| 61 |
Correct |
39 ms |
12240 KB |
Output is correct |
