#line 2 "header.hpp"

//%snippet.set('header')%
//%snippet.fold()%
#ifndef HEADER_H
#define HEADER_H

// template version 2.0
using namespace std;
#include <bits/stdc++.h>

// varibable settings
const long long INF = 1e18;

#define _overload3(_1, _2, _3, name, ...) name
#define _rep(i, n) repi(i, 0, n)
#define repi(i, a, b) for (ll i = (ll)(a); i < (ll)(b); ++i)
#define rep(...) _overload3(__VA_ARGS__, repi, _rep, )(__VA_ARGS__)
#define _rrep(i, n) rrepi(i, 0, n)
#define rrepi(i, a, b) for (ll i = (ll)((b)-1); i >= (ll)(a); --i)
#define r_rep(...) _overload3(__VA_ARGS__, rrepi, _rrep, )(__VA_ARGS__)
#define each(i, a) for (auto &&i : a)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define pb(a) push_back(a)
#define mp(a, b) make_pair(a, b)
#define mt(...) make_tuple(__VA_ARGS__)
#define ub upper_bound
#define lb lower_bound
#define lpos(A, x) (lower_bound(all(A), x) - A.begin())
#define upos(A, x) (upper_bound(all(A), x) - A.begin())
template <class T>
inline void chmax(T &a, const T &b) {
    if ((a) < (b)) (a) = (b);
}
template <class T>
inline void chmin(T &a, const T &b) {
    if ((a) > (b)) (a) = (b);
}

#define divceil(a, b) ((a) + (b)-1) / (b)
#define is_in(x, a, b) ((a) <= (x) && (x) < (b))
#define uni(x)    \
    sort(all(x)); \
    x.erase(unique(all(x)), x.end())
#define slice(l, r) substr(l, r - l)

typedef long long ll;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef long double ld;
typedef pair<ll, ll> pii;
typedef tuple<ll, ll, ll> iii;

template <typename T>
using PQ = priority_queue<T, vector<T>, greater<T>>;
struct Fast {
    Fast() {
        std::cin.tie(0);
        ios::sync_with_stdio(false);
    }
} fast;
void check_input() {
    assert(cin.eof() == 0);
    int tmp;
    cin >> tmp;
    assert(cin.eof() == 1);
}

#if defined(PCM) || defined(LOCAL)
#else
#define dump(...) ;
#define dump_1d(...) ;
#define dump_2d(...) ;
#define cerrendl ;
#endif

#endif /* HEADER_H */
//%snippet.end()%
#line 2 "solve.cpp"

// ll mod = 1e9 + 7;
ll mod = 998244353;
struct mll {  //{{{
    ll x;
    mll(ll x = 0) : x((x % mod + mod) % mod) {}

    // ?= operator
    mll& operator+=(const mll a) {
        (x += a.x) %= mod;
        return *this;
    }
    mll& operator-=(const mll a) {
        (x += mod - a.x) %= mod;
        return *this;
    }
    mll& operator*=(const mll a) {
        (x *= a.x) %= mod;
        return *this;
    }
    mll& operator/=(const mll& rhs) {
        if (rhs.x == 0) throw runtime_error("mll zero division");
        return *this *= rhs.inv();
    }

    mll operator+(const mll a) const {
        mll res(*this);
        return res += a;
    }
    mll operator-(const mll a) const {
        mll res(*this);
        return res -= a;
    }
    mll operator*(const mll a) const {
        mll res(*this);
        return res *= a;
    }
    mll operator/(const mll a) const {
        mll res(*this);
        return res /= a;
    }

    mll pow(ll n) const {
        mll res(1), x(*this);
        if (n < 0) {
            n = -n;
            x = (*this).inv();
        }
        while (n) {
            if (n & 1) res *= x;
            x *= x;
            n >>= 1;
        }
        return res;
    }

    mll inv() const {
        if (x == 0) throw runtime_error("inv does not exist");
        return pow(mod - 2);
    }
    // mll inv()const{
    //     ll x,y;
    //     ll g=extgcd(v,mod,x,y);
    //     assert(g==1);
    //     if(x<0)x+=mod;
    //     return mll(x);
    // }

    bool operator<(const mll& r) const { return x < r.x; }
    bool operator==(const mll& r) const { return x == r.x; }
};
istream& operator>>(istream& is, const mll& a) { return is >> a.x; }
ostream& operator<<(ostream& os, const mll& a) { return os << a.x; }
//}}}

struct combination {  // {{{
    vector<mll> fact, ifact;
    combination(ll n) : fact(n + 1), ifact(n + 1) {
        assert(n < mod);
        fact[0] = 1;
        for (ll i = 1; i <= n; ++i) fact[i] = fact[i - 1] * i;
        ifact[n] = fact[n].inv();
        for (ll i = n; i >= 1; --i) ifact[i - 1] = ifact[i] * i;
    }
    mll operator()(ll n, ll k) {
        if (k < 0 || k > n) return 0;
        return fact[n] * ifact[k] * ifact[n - k];
    }
}  // }}}
com(500001);

ll solve() {
    ll n,m,k;cin>>n>>m>>k;

    mll ans = 0;
    rep(x, 0, k+1){
        // cerrendl;
        // dump(n-1, x);
        // dump(com(n-1, x));
        // dump(mll(m-1).pow(n-1-x));
        ans += com(n-1, x) * mll(m-1).pow(n-1-x);
    }
    ans *= m;
    cout << ans << endl;

    return 0; 
}


int main(){/*{{{*/
    solve();
    check_input();
    return 0;
}/*}}}*/


Measured memory_bytes: 11048