MOD = 998244353
m, x, y = map(int, input().split())
n = abs(y - x) - 1
if x == 1 or x == m:
    n += 1
if y == 1 or y == m:
    n += 1
if n == 0:
    print(0)
else:
    a, b, c = 1, 1, 1
    for i in range(n - 2):
        a, b, c = b, c, a + c
        a %= MOD
        b %= MOD
        c %= MOD
    print(b)