mod = 998244353 def main(): import sys input = sys.stdin.readline from collections import deque N = int(input()) if N == 1: print(1) exit() adj = [[] for _ in range(N + 1)] for v in range(2, N + 1): p = int(input()) adj[v].append(p) adj[p].append(v) que = deque() que.append(1) seen = [-1] * (N+1) seen[1] = 0 par = [0] * (N+1) child = [[] for _ in range(N+1)] seq = [] while que: v = que.popleft() seq.append(v) for u in adj[v]: if seen[u] == -1: seen[u] = seen[v] + 1 par[u] = v child[v].append(u) que.append(u) seq.reverse() dp = [0] * (N + 1) for v in seq: if v == 1: print(dp[1]) else: p = par[v] if not child[v]: dp[v] = 1 dp[p] = (dp[p] + dp[v])%mod else: dp[p] = (dp[p] + dp[v] * 2)%mod if __name__ == '__main__': main()