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


template <typename T> T mod_inv_in_range(T a, T m) {
	// assert(0 <= a && a < m);
	T x = a, y = m;
	// coeff of a in x and y
	T vx = 1, vy = 0;
	while (x) {
		T k = y / x;
		y %= x;
		vy -= k * vx;
		std::swap(x, y);
		std::swap(vx, vy);
	}
	assert(y == 1);
	return vy < 0 ? m + vy : vy;
}

template <typename T> struct extended_gcd_result {
	T gcd;
	T coeff_a, coeff_b;
};
template <typename T> extended_gcd_result<T> extended_gcd(T a, T b) {
	T x = a, y = b;
	// coeff of a and b in x and y
	T ax = 1, ay = 0;
	T bx = 0, by = 1;
	while (x) {
		T k = y / x;
		y %= x;
		ay -= k * ax;
		by -= k * bx;
		std::swap(x, y);
		std::swap(ax, ay);
		std::swap(bx, by);
	}
	return {y, ay, by};
}

template <typename T> T mod_inv(T a, T m) {
	a %= m;
	a = a < 0 ? a + m : a;
	return mod_inv_in_range(a, m);
}


template <int MOD_> struct modnum {
	static constexpr int MOD = MOD_;
	static_assert(MOD_ > 0, "MOD must be positive");

private:
	int v;

public:

	modnum() : v(0) {}
	modnum(int64_t v_) : v(int(v_ % MOD)) { if (v < 0) v += MOD; }
	explicit operator int() const { return v; }
	friend std::ostream& operator << (std::ostream& out, const modnum& n) { return out << int(n); }
	friend std::istream& operator >> (std::istream& in, modnum& n) { int64_t v_; in >> v_; n = modnum(v_); return in; }

	friend bool operator == (const modnum& a, const modnum& b) { return a.v == b.v; }
	friend bool operator != (const modnum& a, const modnum& b) { return a.v != b.v; }

	modnum inv() const {
		modnum res;
		res.v = mod_inv_in_range(v, MOD);
		return res;
	}
	friend modnum inv(const modnum& m) { return m.inv(); }
	modnum neg() const {
		modnum res;
		res.v = v ? MOD-v : 0;
		return res;
	}
	friend modnum neg(const modnum& m) { return m.neg(); }

	modnum operator- () const {
		return neg();
	}
	modnum operator+ () const {
		return modnum(*this);
	}

	modnum& operator ++ () {
		v ++;
		if (v == MOD) v = 0;
		return *this;
	}
	modnum& operator -- () {
		if (v == 0) v = MOD;
		v --;
		return *this;
	}
	modnum& operator += (const modnum& o) {
		v -= MOD-o.v;
		v = (v < 0) ? v + MOD : v;
		return *this;
	}
	modnum& operator -= (const modnum& o) {
		v -= o.v;
		v = (v < 0) ? v + MOD : v;
		return *this;
	}
	modnum& operator *= (const modnum& o) {
		v = int(int64_t(v) * int64_t(o.v) % MOD);
		return *this;
	}
	modnum& operator /= (const modnum& o) {
		return *this *= o.inv();
	}

	friend modnum operator ++ (modnum& a, int) { modnum r = a; ++a; return r; }
	friend modnum operator -- (modnum& a, int) { modnum r = a; --a; return r; }
	friend modnum operator + (const modnum& a, const modnum& b) { return modnum(a) += b; }
	friend modnum operator - (const modnum& a, const modnum& b) { return modnum(a) -= b; }
	friend modnum operator * (const modnum& a, const modnum& b) { return modnum(a) *= b; }
	friend modnum operator / (const modnum& a, const modnum& b) { return modnum(a) /= b; }
};

template <typename T> T pow(T a, long long b) {
	assert(b >= 0);
	T r = 1; while (b) { if (b & 1) r *= a; b >>= 1; a *= a; } return r;
}

struct UF {
    int n;
    vector<int> par;
    UF(int _n) : n(_n) {
        for(int i = 0; i < n; i++) par.push_back(i);
    }
    int find(int a){
        if(a != par[a]) par[a] = find(par[a]);
        return par[a];
    }
    bool join(int a, int b){
        a = find(a);
        b = find(b);
        par[a] = b;
        return (a != b);
    }
};

using num = modnum<int(1e9)+7>;

vector<num> fact, ifact;

void init(){
	int N = 1100000;
	fact.resize(N);
	fact[0] = 1;
	for(int i = 1; i < N; i++) fact[i] = i * fact[i-1];
	ifact.resize(N);
	ifact.back() = 1 / fact.back();
	for(int i = N - 1; i > 0; i--) ifact[i-1] = i * ifact[i];
}

num ncr(int n, int k){
	if(k < 0 || k > n) return 0;
	return fact[n] * ifact[k] * ifact[n-k];
}

int main(){
	ios_base::sync_with_stdio(false), cin.tie(nullptr);
	init();
	int N;
	cin >> N;
	int M;
	cin >> M;
	vector<int> a(N);
	for(int i = 0; i < N; i++){
		cin >> a[i];
	}
	UF uf(N);
	UF uf2(2*N);
	vector<pair<int,int> > edges;
	for(int i = 0; i < M; i++){
		int u, v;
		cin >> u >> v;
		u--; v--;
		edges.push_back({u, v});
		uf.join(u, v);
		uf2.join(u, v+N);
		uf2.join(u+N, v);
	}
	vector<vector<int> > cc(N);
	for(int i = 0; i < N; i++){
		cc[uf.find(i)].push_back(i);
	}
	num ans = 1;
	for(int i = 0; i < N; i++){
		if(uf.find(i) != i) continue;
		if(uf2.find(i) == uf2.find(i+N)){
			ans *= pow(num(2), (int)cc[i].size() - 1);
		} else {
			vector<int> freq(2, 0);
			for(int x : cc[i]){
				freq[int(uf2.find(x) == uf2.find(i)) ^ a[x]]++;
			}
			ans *= ncr(freq[0] + freq[1], freq[0]);
		}
	}
	cout << ans << '\n';
}