import sys,math
#if len(sys.argv)==2:sys.stdin=open(sys.argv[1])
from collections import defaultdict,deque
from itertools import combinations,permutations,accumulate,product
from bisect import bisect,bisect_left,bisect_right
from heapq import heappop,heappush,heapify
#from sortedcontainers import SortedList,SortedSet
def input(): return sys.stdin.readline().rstrip()
def ii(): return int(input())
def ms(): return map(int, input().split())
def li(): return list(map(int,input().split()))
#////////////////////////////////////
N,M = ms()
C = li()
ans = 0
gro = defaultdict(list)
for i in range(N):
  gro[C[i]].append(i+1)
cnt = defaultdict(int)
for _ in range(M):
  u,v = ms()
  if C[u-1]==C[v-1]:
    cnt[C[u-1]] += 1
for c in gro.keys():
  ans += max(len(gro[c])-cnt[c]-1,0)
print(ans)