mod = 998244353


def main():
    N, X, Y = map(int, input().split())
    if N == 2 or N == 3:
        return 1

    if X > Y:
        X, Y = Y, X

    if X != 1:
        X += 1
    if Y != N:
        Y -= 1

    M = Y - X
    dp = [0] * (M + 5)
    dp[0] = 1
    for i in range(M):
        dp[i] %= mod
        dp[i+1] += dp[i]
        dp[i+3] += dp[i]
    return dp[M] % mod


print(main())