#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define FORR2(x,y,arr) for(auto& [x,y]:arr)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
template<class T> bool chmax(T &a, const T &b) { if(a<b){a=b;return 1;}return 0;}
template<class T> bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;}
//-------------------------------------------------------

const ll mo=998244353;

ll comb(ll N_, ll C_) {
	const int NUM_=400001;
	static ll fact[NUM_+1],factr[NUM_+1],inv[NUM_+1];
	if (fact[0]==0) {
		inv[1]=fact[0]=factr[0]=1;
		for (int i=2;i<=NUM_;++i) inv[i] = inv[mo % i] * (mo - mo / i) % mo;
		for (int i=1;i<=NUM_;++i) fact[i]=fact[i-1]*i%mo, factr[i]=factr[i-1]*inv[i]%mo;
	}
	if(C_<0 || C_>N_) return 0;
	return factr[C_]*fact[N_]%mo*factr[N_-C_]%mo;
}

int H,W,K;
ll from[505],to[505];


void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>H>>W>>K;
	H--,W--;
	K/=2;
	ll ret=0;
	if(K<=500) {
		from[0]=1;
		for(x=0;x<=min(H,W);x++) {
			ll other=comb(H+W,H-x)*comb(W+x,W-x)%mo;
			(ret+=other*from[0])%=mo;
			FOR(i,K+1) to[i]=(from[abs(i-1)]+from[abs(i+1)])%mo;
			FOR(i,K+1) from[i]=(to[abs(i-1)]+to[abs(i+1)])%mo;
		}
	}
	else {
		for(x=0;x<=min(H,W);x++) {
			ll other=comb(H+W,H-x)*comb(W+x,W-x)%mo;
			ll R=comb(2*x,x);
			for(i=1;i*(K+1)<=x;i++) {
				if(i%2) R+=mo-comb(2*x,x-i*(K+1));
				else R+=comb(2*x,x-i*(K+1));
			}
			(ret+=R%mo*other)%=mo;
		}
	}
	
	cout<<ret<<endl;
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}