n,x,y = map(int,input().split())
mod = 998244353

if x > y:
    x,y = y,x

start = x+1
if x != 1 and x+1 == y:
    if y == n:
        print(1)
    else:
        print(0)
    exit()

end = y-1

dif = end-start

if y == 1 or y == n:
    dif += 1
if x == 1 or x == n:
    dif += 1

dp = [0]*(dif+1)
dp[0] = 1
for i in range(dif):
    dp[i+1] += dp[i]
    dp[i+1] %= mod
    if i+3 <= dif:
        dp[i+3] += dp[i]
        dp[i+3] %= mod
print(dp[-1]%mod)