n,x,y=map(int,input().split())
x,y=min(x,y),max(x,y)
d=y-x-1

if x==1:
  d+=1
if y==n:
  d+=1

if d<=0:
  print(0)
  exit()

mod=998244353
dp=[0]*d
dp[0]=1
for i in range(1,d):
  dp[i]+=dp[i-1]
  if i-3>=0:
    dp[i]+=dp[i-3]
  dp[i]%=mod

print(dp[-1])
#print(dp)