#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
//-------------------------------------------------------

int N,M;
int W[300];
int I[40404],J[40404];
ll mo=1000000007;
int mat[300][300];

static const int N_=1020;
static ll C_[N_][N_];

ll fact[1010][1010];
ll dp[1010][1010];


void solve() {
	int i,j,k,l,r,x,y,z; string s;
	
	
	FOR(i,N_) C_[i][0]=C_[i][i]=1;
	for(i=1;i<N_;i++) for(j=1;j<i;j++) C_[i][j]=(C_[i-1][j-1]+C_[i-1][j])%mo;
	
	FOR(i,1010) {
		fact[i][0]=1;
		FOR(j,1001) fact[i][j+1]=fact[i][j]*i%mo;
	}
	
	cin>>N>>M;
	FOR(i,N) {
		cin>>W[i], mat[i][i]=W[i];
		z=W[i];
		
		for(x=1;x<=z;x++) {
			dp[z][x]=fact[x][z];
			for(y=1;y<x;y++) {
				dp[z][x] -= C_[x][y] * dp[z][y] % mo;
				if(dp[z][x]<0) dp[z][x] += mo;
			}
		}
	}
	FOR(i,M) {
		cin>>I[i]>>J[i], I[i]--, J[i]--;
		mat[I[i]][J[i]]=min(W[I[i]],W[J[i]]);
	}
	
	FOR(z,N) FOR(x,N) FOR(y,N) mat[x][y] = max(mat[x][y], min(mat[x][z],mat[z][y]));
	
	ll ret=0;
	FOR(x,N) FOR(y,N) if(mat[x][y]>=W[y] && W[x]>=W[y]) ret +=dp[W[x]][W[y]];
	
	cout<<ret%mo<<endl;
	
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false);
	FOR(i,argc-1) s+=argv[i+1],s+='\n';
	FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	solve(); return 0;
}