N,X,Y=map(int,input().split())
mod=998244353

DP=[0]*(3*10**5)

DP[0]=1

for i in range(1,3*10**5):
    DP[i]=(DP[i-1]+DP[i-3])%mod

k=abs(X-Y)

if X==1 and Y==N:
    print(DP[k])
elif Y==1 and X==N:
    print(DP[k])
elif X==1 or Y==1 or X==N or Y==N:
    print(DP[k-1])
else:
    if k-2<0:
        print(0)
    else:
        print(DP[k-2])