#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic pop
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint998244353;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  VVI to(n);
  for(int i = 1; i < n; i++) {
    int p;
    cin >> p;
    p--;
    to[p].emplace_back(i);
  }
  auto dfs = [&](auto&& self, int u) -> pair<mint, mint> {
    mint res1 = 1, res2 = 1;
    for(int v: to[u]) {
      auto [r1, r2] = self(self, v);
      res1 *= r1;
      res2 *= r1 + r2;
    }
    return {res1, res2};
  };
  mint ans = 1;
  for(int u: to[0]) for(int v: to[u]) {
    auto [r1, r2] = dfs(dfs, v);
    ans *= r1 + r2;
  }
  cout << ans.val() << '\n';
}