#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
#define TASK ""
#define ALL(x) (x).begin(), (x).end()
using namespace std;
template <typename T1, typename T2> bool mini(T1 &a, T2 b) {
if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maxi(T1 &a, T2 b) {
if (a < b) {a = b; return true;} return false;
}
const int N = 1505
const int oo = 1e9;
const long long ooo = 1e18;
const int mod = 1e9 + 7; // 998244353;
const long double pi = acos(-1);
vector <int> adj[N];
int dp[N][N];
int n,d;
void dfs1(int u) {
for (int v : adj[u])
dfs1(v);
dp[u][0] = 1;
for (int v : adj[u])
dp[u][0] += dp[v][d - 1];
for (int i = 1; i <= d; i++) {
int mx = 0;
for (int v : adj[u]) {
if (i <= (d >> 1)) {
dp[u][i] += dp[v][d - i - 1];
maxi(mx, dp[v][i - 1] - dp[v][d - i - 1]);
} else {
dp[u][i] += dp[v][i - 1];
}
}
dp[u][i] += mx;
}
for (int i = d - 1; i >= 0; i--)
maxi(dp[u][i], dp[u][i + 1]);
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
#ifdef ONLINE_JUDGE
// freopen(TASK".inp","r",stdin);
// freopen(TASK".out","w",stdout);
#endif
cin >> n >> d;
for (int i = 2; i <= n; i++) {
int j; cin >> j;
j++;
adj[j].push_back(i);
}
if (n <= 1500 && d <= 1500) {
dfs1(1);
int ans = 0;
for (int i = 0; i <= d; i++)
maxi(ans, dp[1][i]);
cout << ans;
}
return 0;
}
Compilation message
catinatree.cpp:15:1: error: expected ',' or ';' before 'const'
15 | const int oo = 1e9;
| ^~~~~
