N,X,Y = map(int, input().split())

mod = 998244353
if X<Y:
    if X>1:X+=1
    if Y<N:Y-=1
    if Y<X:print(0)
    else:
        dp = [0]*(Y-X+1)
        dp[0] = 1
        for i in range(Y-X):
            dp[i+1] += dp[i]
            dp[i+1] %= mod
            if i+3<=Y-X:
                dp[i+3] += dp[i]
                dp[i+3] %= mod
        print(dp[-1])

else:
    if Y>1:Y+=1
    if X<N:X-=1
    if Y>X:print(0)
    else:
        dp = [0]*(X-Y+1)
        dp[0] = 1
        for i in range(X-Y):
            dp[i+1] += dp[i]
            dp[i+1] %= mod
            if i+3<=X-Y:
                dp[i+3] += dp[i]
                dp[i+3] %= mod
        print(dp[-1])