#include <bits/stdc++.h>

using namespace std;

const int MOD = 1000000007; // 998244353; // 998244853;

template <typename T>
struct modular {
    constexpr modular() : val(0){}
    constexpr modular(const modular<T>& _m) : val(_m.val) {}
    template <typename U> constexpr modular(const U& _r = U()) {
        val = -MOD <= _r && _r < MOD ? _r: _r % MOD;
        if (val < 0) { val += MOD; } }
    const T operator()() { return val; }
    template <typename U> explicit operator U() const { return static_cast<U>(val); }
    modular<T>& operator+=(const modular<T>& _m) { if ((val += _m.val) >= MOD) { val -= MOD; } return *this; }
    modular<T>& operator-=(const modular<T>& _m) { if ((val -= _m.val) < 0) { val += MOD; } return *this; }
    modular<T>& operator*=(const modular<T>& _m) { val = modular<T>(static_cast<int64_t>(val) * static_cast<int64_t>(_m.val)).val; return *this; }
    modular<T>& operator/=(const modular<T>& _m) {
        T a = _m.val, b = MOD, u = 0, v = 1;
        while (a != 0) {
            T q = b / a;
            b -= q * a; swap(a, b);
            u -= q * v; swap(u, v); 
        } return *this *= u; }
    modular<T>& operator =(const modular<T>& _m) { val = _m.val; return *this; }
    template <typename U> modular<T>& operator+=(const U& _r) { return *this += modular<T>(_r); }
    template <typename U> modular<T>& operator-=(const U& _r) { return *this -= modular<T>(_r); }
    template <typename U> modular<T>& operator*=(const U& _r) { return *this *= modular<T>(_r); }
    template <typename U> modular<T>& operator/=(const U& _r) { return *this /= modular<T>(_r); } 
    template <typename U> modular<T>& operator =(const U& _r) { val = modular<T>(_r).val; return *this; }
    modular<T> operator-() { return modular<T>(-val); }    
    template <typename U> friend bool operator==(const modular<U>&, const modular<U>&);
    friend std::istream& operator>>(std::istream& os, modular<T>& _m) { os >> _m.val; _m *= 1; return os; }
    friend std::ostream& operator<<(std::ostream& os, const modular<T>& _m) { return os << _m.val; }
    template <typename U>
    modular<T> exp(U e) {
        modular<T> res = 1;
        modular<T> b = val;
        if (e < 0) { b = 1/b; e *= -1; }
        for (; e; e >>= 1) {
            if (e & 1) { res *= b; }
            b *= b;
        } return res; }
private:
    T val;
};
template <typename T> inline modular<T> operator+(const modular<T>& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) += _rhs; }
template <typename T, typename U> inline modular<T> operator+(const modular<T>& _lhs, const U& _rhs) { return modular<T>(_lhs) += _rhs; }
template <typename T, typename U> inline modular<T> operator+(const U& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) += _rhs; }
template <typename T> inline modular<T> operator-(const modular<T>& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) -= _rhs; }
template <typename T, typename U> inline modular<T> operator-(const modular<T>& _lhs, const U& _rhs) { return modular<T>(_lhs) -= _rhs; }
template <typename T, typename U> inline modular<T> operator-(const U& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) -= _rhs; }
template <typename T> inline modular<T> operator*(const modular<T>& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) *= _rhs; }
template <typename T, typename U> inline modular<T> operator*(const modular<T>& _lhs, const U& _rhs) { return modular<T>(_lhs) *= _rhs; }
template <typename T, typename U> inline modular<T> operator*(const U& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) *= _rhs; }
template <typename T> inline modular<T> operator/(const modular<T>& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) /= _rhs; }
template <typename T, typename U> inline modular<T> operator/(const modular<T>& _lhs, const U& _rhs) { return modular<T>(_lhs) /= _rhs; }
template <typename T, typename U> inline modular<T> operator/(const U& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) /= _rhs; }
template <typename T> inline bool operator==(const modular<T>& _lhs, const modular<T>& _rhs) { return _lhs.val == _rhs.val; }
template <typename T, typename U> inline bool operator==(const modular<T>& _lhs, const U& _rhs) { return _lhs == modular<T>(_rhs); }
template <typename T, typename U> inline bool operator==(const U& _lhs, const modular<T>& _rhs) { return modular<T>(_lhs) == _rhs; }
template <typename T> inline bool operator!=(const modular<T>& _lhs, const modular<T>& _rhs) { return !(_lhs == _rhs); }
template <typename T, typename U> inline bool operator!=(const modular<T>& _lhs, const U& _rhs) { return !(_lhs == _rhs); }
template <typename T, typename U> inline bool operator!=(const U& _lhs, const modular<T>& _rhs) { return !(_lhs == _rhs); }
typedef modular<int> mint;

struct Comb {
    int N;
    vector<mint> fac, ifac, inv;

    Comb(int _n=1) {
        resize(2);
        fac[0] = fac[1] = ifac[0] = ifac[1] = inv[1] = 1;
        N = 1; grow(_n);
    }

    void resize(int _s) {
        fac.resize(_s); ifac.resize(_s); inv.resize(_s);
    }
    bool grow(int _n) {
        if (_n <= N) return false;
        swap(_n, N); resize(N+1);
        for (int i = _n+1; i <= N; i++) {
            fac[i] = fac[i-1] * i;
            inv[i] = (-MOD/i) * inv[MOD%i];
            ifac[i] = ifac[i-1] * inv[i];
        }
        return true;
    }
    // perm
    mint a(int n, int k) {
        if (n < k || k < 0) return 0;
        if (n > N) grow(n);
        return fac[n] * ifac[n-k];
    }
    // choose
    mint c(int n, int k) {
        if (n < k || k < 0) return 0;
        if (n > N) grow(n);
        return fac[n] * ifac[n-k] * ifac[k];
    }
}c(5123);

void solve() {
    int n; cin >> n;
    vector<vector<int>> g(n);
    for (int _ = 1; _ < n; _++) {
        int x, y;
        cin >> x >> y;
        x--;y--;
        g[x].emplace_back(y);
        g[y].emplace_back(x);
    }
    vector<int> pa(n, -1);
    vector<int> sz(n, 1);
    function<void(int,int)> dfs = [&](int u,int p){
        for (int v:g[u])if(v!=p){
            pa[v] = u;
            dfs(v,u);
            sz[u] += sz[v];
        }
    };
    dfs(0,-1);
    vector<int> cds;
    for (int i = 0; i < n; i++) {
        if (all_of(g[i].begin(), g[i].end(), [&](int v){
                    if (v!=pa[i]) return sz[v] <= n/2;
                    else return n-sz[i] <= n/2;
                    })) {
            cds.emplace_back(i);
        }
    }

    assert(cds.size() <= 2);
    if (cds.size() == 2) {
        assert(n%2 == 0);
        mint res = c.fac[n/2] * c.fac[n/2];
        cout << res; return;
    }
    int cd = cds[0];
    vector<int> sub;
    for (int v: g[cd]) {
        if (v != pa[cd]) {
            sub.emplace_back(sz[v]);
        }else{
            sub.emplace_back(n-sz[cd]);
        }
    }
    vector<mint> dp(n);
    dp[0] = 1;
    int sum = 0;
    for (int x: sub) {
        for (int i = sum; i >= 0; i--) {
            for (int j = x; j >= 1; j--) {
                dp[i+j] += dp[i] * c.c(x, j)*c.a(x,j);
            }
        }
        sum += x; 
    }
    mint res = 0;
    for (int i = 0; i < n; i++) {
        mint tmp = dp[i] * c.fac[n-i];
        (i&1)?(res-=tmp):(res+=tmp);
    }
    cout << res;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    solve();
    cout << endl;
}


Measured memory_bytes: 1024