#include<bits/stdc++.h>
using namespace std;
#define ll long long
namespace IO{//by cyffff
	int len=0;
	char ibuf[(1<<21)+1],*iS,*iT,out[(1<<25)+1];
	#if ONLINE_JUDGE
	#define gh() (iS==iT?iT=(iS=ibuf)+fread(ibuf,1,(1<<21)+1,stdin),(iS==iT?EOF:*iS++):*iS++)
 	#else
	#define gh() getchar()
	#endif
	#define reg register
	inline int read(){
		reg char ch=gh();
		reg int x=0;
		reg char t=0;
		while(ch<'0'||ch>'9')   t|=ch=='-',ch=gh();
		while(ch>='0'&&ch<='9') x=x*10+(ch^48),ch=gh();
		return t?-x:x;
	}
	inline void putc(char ch){
		out[len++]=ch;
	}
	template<class T>
	inline void write(T x){
		if(x<0)putc('-'),x=-x;
		if(x>9)write(x/10);
		out[len++]=x%10+48;
	}
	inline void flush(){
		fwrite(out,1,len,stdout);
		len=0;
	}
	inline char getc(){
		char ch=gh();
		while(ch<'A'||ch>'Z') ch=gh();
		return ch;
	}
}
using IO::read;
using IO::write;
using IO::flush;
using IO::getc;
using IO::putc;
const int N=4e5+10,mod=998244353;
int n,m,d[N],v[N],s;
vector<int>a[N],b[N];
int vis[N];
int main(){
	n=read(),m=read();
	for(int i=1;i<=n;i++)
		v[i]=read();
	for(int i=1;i<=m;i++){
		int u=read()+1,v=read()+1;
		b[u].push_back(v),b[v].push_back(u);
		d[u]++,d[v]++;
	}
	for(int i=1;i<=n;i++)
		for(auto j:b[i])
			if(d[i]<d[j]||i<j&&d[i]==d[j])
				a[i].push_back(j);
	for(int i=1;i<=n;i++){
		for(int j:a[i])
			vis[j]=i;
		for(int j:a[i])
			for(int k:a[j])
				if(vis[k]==i)
					s=(s+1ll*v[i]*v[j]%mod*v[k])%mod;
	}
	write(s);
	flush();
}