#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef vector<ll> vll;
typedef vector<vll> vvll;

ll FF=(1000000000+7);

ll countArray(int n, int k, int x) {
    vvll v(n,vll(2,0));
    v[0][0]=1;
    for (int i=1; i<n; i++){
        v[i][0]=(v[i-1][1]*(k-1))%FF;
        v[i][1]=(v[i-1][0]+((v[i-1][1]*(k-2))%FF))%FF;
    }
    if (x==1){
        return v[n-1][0];
    }
    return v[n-1][1];
}

int main() {
    int n;
    int k;
    int x;
    cin >> n >> k >> x;
    long answer = countArray(n, k, x);
    cout << answer << endl;
    return 0;
}