#include<bits/stdc++.h>
#define REP(x,y,z) for(int x=y;x<=z;x++)
#define FORD(x,y,z) for(int x=y;x>=z;x--)
#define MSET(x,y) memset(x,y,sizeof(x))
#define FOR(x,y) for(__typeof(y.begin()) x=y.begin();x!=y.end();x++)
#define F first
#define S second
#define MP make_pair
#define PB push_back
#define SZ size()
#define M 1005
void RI(){}
template<typename... T>
void RI( int& head, T&... tail ) {
    scanf("%d",&head);
    RI(tail...);
}
using namespace std;
typedef long long LL;
int n,m,in[M];
LL dp[M][M],ans,MOD = 1000000007;
bool con[M][M],vis[M],edg[M][M];
void dfs(int cur,int l)
{
	vis[cur] =true;
	REP(i,1,n) if(!vis[i] && edg[cur][i] && in[i]>=l)
		dfs(i, l);
}
int main()
{
	REP(i,1,M-1)
	{
		LL sum=0;

		dp[i][1] = sum = 1;

		REP(j,2,i)
		{
			dp[i][j] = j*(dp[i-1][j] + dp[i-1][j-1]);
			dp[i][j] %= MOD;
		}
	}

	int x,y;
	while(~scanf("%d %d",&n,&m))
	{
		ans=0;
		MSET(con, false);
		MSET(edg, false);
		
		REP(i,1,n) RI(in[i]);
		REP(i,1,m)
		{
			RI(x,y);
			edg[y][x] = true;
		}

		REP(ed,1,n)
		{
			MSET(vis, false);
			dfs(ed, in[ed]);
			REP(i,1,n) if(vis[i]) con[i][ed] = true;
		}

		REP(i,1,n)REP(j,1,n) if(con[i][j])
			ans = (ans+dp[i][j]) % MOD;
		printf("%lld\n",ans%MOD);
	}
	
	return 0;
}