#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
using namespace std;
using ll=long long;
const int mod=998244353;
#define rep(i,a,b) for (ll i=a;i<b;i++)

namespace po167{
struct combination{
	int upper;
	long long MOD;
	std::vector<long long> fact;
	std::vector<long long> rev;
	std::vector<long long> fact_rev;
	combination(int max,long long mod):upper(max),MOD(mod),fact(max+1),rev(max+1),fact_rev(max+1){
		for(long long i=0;i<=max;i++){
			if(i<2){
				fact[i]=1;
				fact_rev[i]=1;
				rev[i]=1;
				continue;
			}
			fact[i]=(fact[i-1]*i)%mod;
			rev[i]=mod-((mod/i)*rev[mod%i])%mod;
			fact_rev[i]=(fact_rev[i-1]*rev[i])%mod;
		}
	}
	long long Comb(int x,int y){
		assert(upper>=x);
		if (x<y||y<0||x<0) return 0;
		return (((fact_rev[y]*fact_rev[x-y])%MOD)*fact[x])%MOD;
	}
	long long P(int x,int y){
		assert(upper>=x);
		if (x<y||y<0||x<0) return 0;
		return (fact_rev[x-y]*fact[x])%MOD;
	}
};
}
using po167::combination;



void solve();
// oddloop
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	
	int t=1;
	//cin>>t;
	rep(i,0,t) solve();
}

void solve(){
	int N;
	ll B,C;
	cin>>N>>B>>C;
	combination table(N,mod);
	vector<vector<ll>> f(2);
	rep(i,0,N+1) f[i&1].push_back(table.Comb(N,i));
	vector<ll> ans={1};
	auto convolution=[&](vector<ll> l,vector<ll> r)->vector<ll>{
		int n=l.size(),m=r.size();
		vector<ll> res(n+m-1);
		rep(i,0,n) rep(j,0,m){
			res[i+j]=(res[i+j]+l[i]*r[j])%mod;
		}
		return res;
	};
	rep(d,0,63){
        int ind=(B&1)-(C&1);
		vector<ll> n_ans;
		while(ind<(int)(ans.size())){
            if(ind<0) n_ans.push_back(0);
            else n_ans.push_back(ans[ind]);
            ind+=2;
        }
        ans=convolution(n_ans,f[C&1]);
		B>>=1,C>>=1;
	}
	cout<<ans[0]<<"\n";
}