#include <bits/stdc++.h>
using namespace std;
long long int M = 998244353;
long long int expo(long long int x, long long int n) {
  long long int res = 1;
  while (n) {
    if (n % 2) {
      res = (res * x) % M;
    }
    x = (x * x) % M;
    n /= 2;
  }
  return res;
}
long long int f(long long int n, long long int r) {
  long long int res1 = 1, res2 = 1;
  while (r) {
    res1 = (res1 * (n--)) % M;
    res2 = (res2 * (r--)) % M;
  }
  return ((res1 % M) * (expo(res2, M - 2))) % M;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long int n, m, k;
  cin >> n >> m >> k;
  cout << (((m * (expo(m - 1, k))) % M) * (f(n - 1, k))) % M << endl;
}
