n, x, y = map(int,input().split())
if y < x: x, y = y, x
mod = 998244353
dp = [0] * (2 * 10 ** 5 + 100)
#S = 1, T = Nの場合の答え
dp[0] = 1
for i in range(0, 2 * 10 ** 5 + 1):
    dp[i + 1] += dp[i]
    dp[i + 3] += dp[i]
    dp[i + 1] %= mod
    dp[i + 3] %= mod
if x == 1 and y == n:
    print(dp[y - 1])
elif x == 1:
    print(dp[y - 1])
elif y == n:
    print(dp[y - (x + 1)])
else:
    print(dp[y - 1 - (x + 1)])