from collections import defaultdict
from math import gcd

class UnionFind():
  def __init__(self,n):
    self.n=n
    self.parents=[-1]*n

  def find(self,x):
    if self.parents[x]<0:
      return x
    else:
      self.parents[x]=self.find(self.parents[x])
      return self.parents[x]

  def union(self,x,y):
    x=self.find(x)
    y=self.find(y)

    if x==y:
      return

    if self.parents[x]>self.parents[y]:
      x,y=y,x

    self.parents[x]+=self.parents[y]
    self.parents[y]=x

  def size(self,x):
    return -self.parents[self.find(x)]

  def same(self,x,y):
    return self.find(x)==self.find(y)

  def members(self,x):
    root=self.find(x)
    return [i for i in range(self.n) if self.find(i)==root]

  def roots(self):
    return [i for i, x in enumerate(self.parents) if x< 0]

  def group_count(self):
    return len(self.roots())

  def all_group_members(self):
    group_members=defaultdict(list)
    for member in range(self.n):
      group_members[self.find(member)].append(member)
    return group_members

n,p,q=map(int,input().split())
p,q=min(p,q),max(p,q)
if p==q==1:
  print(1)
  exit()
if p==1 or p==q==n:
  print(2)
  exit()

uf=UnionFind(n)
for i in range(p):
  uf.union(i,p-1-i)
for i in range(q):
  uf.union(n-q+i,n-1-i)

lcm=1
for i in range(n):
  lcm=lcm*uf.size(i)//gcd(lcm,uf.size(i))

print(lcm*2%998244353)