#include <atcoder/all>
#include <bits/stdc++.h>
#define rep(i, a, b) for (ll i = (ll)(a); i < (ll)(b); i++)
using namespace atcoder;
using namespace std;

typedef long long ll;

using mint = modint998244353;

struct Comb {
    const long long MOD = 998244353;
    vector<mint> fact, ifact;
    int MAX_COM;
    Comb() {}
    Comb(int n) {
        MAX_COM = n; // ここでMAX入力を調整
        init(MOD, MAX_COM);
    }
    void init(long long MOD, long long MAX_COM) {
        int n = MAX_COM;
        assert(n < MOD);
        fact = vector<mint>(n + 1);
        ifact = vector<mint>(n + 1);
        fact[0] = 1;
        for (int i = 1; i <= n; ++i)
            fact[i] = fact[i - 1] * i;
        ifact[n] = fact[n].inv();
        for (int i = n; i >= 1; --i)
            ifact[i - 1] = ifact[i] * i;
    }
    mint operator()(long long n, long long k) {
        if (k < 0 || k > n)
            return 0;
        return fact[n] * ifact[k] * ifact[n - k];
    }
};
Comb comb(5000010);

int main() {
    int h, w, m;
    cin >> h >> w >> m;
    int len = h + w - 1;
    if (len > m) {
        cout << "0\n";
        return 0;
    }
    mint ans = comb(m, len);
    ans *= pow_mod(m, h * w - len, 998244353);
    ans *= comb(h + w - 2, h - 1);
    cout << ans.val() << endl;
}