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#include <bits/stdc++.h>
using namespace std;
 
#ifdef DEBUG
auto &operator<<(auto &o, pair<auto, auto> p) {
    return o << "()" << p.first << ", " << p.second <<")";
}
auto operator<<(auto &o, auto x)-> decltype(x.end(), o) {
    o << "{";int i = 0;
    for(auto e : x) o << ", "+!i++<<e;
    return o <<"}";
}
#define debug(x...) cerr << "["#x"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(x)
#else
#define debug(...) {}
#endif
 
#define all(x) x.begin(), x.end()
#define pb push_back
#define fi first
#define se second
typedef pair <int, int> pii;
 
set <vector <bool> > T;
constexpr int MOD = 1e9+7;


void rek(vector <bool> & mask, vector <pii> & kraw) {
    if (T.find(mask) != T.end()) return;
    T.insert(mask);

    for (auto &[x, y] : kraw) {
        if (mask[x] == mask[y]) {
            mask[x] = 1-mask[x];
            mask[y] = 1-mask[y];
            rek(mask, kraw);
            mask[x] = 1-mask[x];
            mask[y] = 1-mask[y];
        }        
    }
}


void dfs(auto & G, auto & vis, int v, auto & path) {
    path.pb(v);
    vis[v] = true;
    for (auto x : G[v]) {
        if (!vis[x]) {
            dfs(G, vis, x, path);
        }
    }
}


long long qpow(long long a, int b) {
    if (b == 0) return 1ll;
    if (b & 1) {
        return (a * qpow(a, b-1))%MOD;
    }
    long long x = qpow(a, b/2);
    return (x*x)%MOD;
}

constexpr int N = 2e5+7;
long long fact[N];

long long C(int a, int b) {
    return max(1ll, (((fact[a]*qpow(fact[b], MOD-2))%MOD)*qpow(fact[a-b], MOD-2))%MOD);
}


void test() {
    int n, m; cin>>n>>m;
    vector <pii> k(m);
    vector <bool> mas(n+1);

    for (int i=1; i<=n; ++i) {
        int x; cin>>x; 
        mas[i] = x;
    }
    for (int i=0; i<m; ++i) {
        cin>>k[i].fi>>k[i].se;
    }

    if (n > 24) {
        fact[0] = 1;
        for (int i=1; i<N; ++i) {
            fact[i] = (fact[i-1]*i)%MOD;
        }
        int res = 1;
        vector <bool> m2[2];
        m2[0] = m2[1] = mas;
        vector <vector <int> > G(n+1);
        vector <int> deg(n+1);
        for (auto &[a, b] : k) {
            G[a].pb(b);
            G[b].pb(a);
            deg[a]++;
            deg[b]++;
        }
        vector <bool> vis(n+1);
        vector <bool> vis2(n+1);
        for (int i=1; i<=n; ++i) {
            if (!vis[i]) {
                vector <int> path;
                dfs(G, vis, i, path);

                int st = path[0];
                for (auto x : path) {
                    if (deg[x] == 1) {
                        st = x;
                    }
                }
                vector <int> path2;
                dfs(G, vis2, st, path2);
                int ile[2] = {0, 0};
                for (int l=0; l<2; l++) {
                    for (int x=0; x<path2.size()-1; ++x) {
                        if (m2[l][path2[x]] == m2[l][path2[x+1]] && m2[l][path2[x]] == l) {
                            m2[l][path2[x]] = m2[l][path2[x+1]] = 1-l;
                        }
                    }
                    for (int x=0; x<path2.size()-1; ++x) {
                        if (m2[l][path2[x]] == 1-l && m2[l][path2[x+1]] == 1-l) {
                            ile[l]++;
                            x++;
                        }
                    }
                }
                int ilem = max(ile[0], ile[1]);
                res = (res * C(path2.size(), ilem))%MOD;
            }
        }
        cout<<res<<'\n';
        return;
    }
    rek(mas, k);
    cout<<T.size()<<'\n';
}
 
signed main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int t = 1; 
//   cin>>t;
  while (t--) {
    test();
  }
}