import sys
sys.setrecursionlimit(100000)

n,m,k=map(int,input().split())
x=set(map(lambda a:int(a)-1,input().split()))
con=[[] for _ in range(n)]

for i in range(m):
	u,v=map(int,input().split())
	con[u-1].append(v-1)
	con[v-1].append(u-1)

possible=[set() for _ in range(n)]
visited=set()

def dfs(now):
	if now in possible[len(visited)]:return
	possible[len(visited)].add(now)
	visited.add(now)
	for nex in con[now]:
		if nex not in visited:
			dfs(nex)
	visited.remove(now)

for i in range(n):
	dfs(i)
	for j in possible:
		if x<=j:
			print("Yes")
			exit()
	possible=[set() for _ in range(n)]
print("No")