N, x, y = gets.split.map(&:to_i)
MOD = 998_244_353

if x > y
  x, y = y, x
end

x += 1 if x != 1
y -= 1 if y != N

d = y - x
dp = Array.new(d + 1, 0)
dp[0] = 1

1.upto(d) do |i|
  dp[i] += dp[i - 1]
  dp[i] += dp[i - 3] if i - 3 >= 0
  dp[i] %= MOD
end

puts dp[d]