MOD = 998244353

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

if x > y:
    x, y = y, x
if y == x + 1 and x != 1 and y != n:
    print(0)
    exit()

if x != 1:
    x += 1
if y != n:
    y -= 1
    
d = y - x + 1
dp = [0, 1, 1, 1]
while len(dp) < d + 1:
    dp.append((dp[-1] + dp[-3]) % MOD)

print(dp[d])