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

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

if x > 1:
    x += 1
if y < n:
    y -= 1
dif = y - x
if dif < 0:
    print(0)
else:
    DP = [0 for _ in range(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[dif])