a,b=map(int,input().split())
c=list(map(int,input().split()))
ans=0
zoff=[]
strawberry=[[] for i in range(a)]
very=sorted(set(c))
for _ in very:
	zoff.append(c.count(_))
for _ in zoff:
    asap = [n for n, v in enumerate(c) if v ==_]
    for i in asap:
    	for j in asap:
    		if i==j:
    			continue
    	strawberry[i].append(j)
ans=sum(zoff)-len(zoff)
for i in range(b):
	yaakiyu,kafeore=map(int,input().split())
	if kafeore-1 in strawberry[yaakiyu-1]:
		ans-=1
print(ans)