N,X,Y=map(int,input().split())
X,Y=X-1,Y-1

MOD = 998244353

if X>Y:X,Y=Y,X
if X!=0:X+=1
if Y!=N-1:Y-=1

d = Y-X+1
if d<3:
    print(max(0,min(1,d)))
    exit()
dp=[0]*d
dp[0]=1
dp[1]=1
dp[2]=1
for i in range(3,d):
    dp[i]=(dp[i-1]+dp[i-3])%MOD
print(dp[-1])