class UnionFind:
  def __init__(self, n):
    self.node = [-1 for _ in range(n)]

  def root(self, v):
    if self.node[v] < 0:
      return v

    st = []
    while self.node[v] >= 0:
      st.append(v)
      v = self.node[v]

    for u in st:
      self.node[u] = v

    return v

  def size(self, v):
    v = self.root(v)
    return (- self.node[v])

  def same(self, u, v):
    return self.root(u) == self.root(v)

  def unite(self, u, v):
    ru = self.root(u)
    rv = self.root(v)
    if ru == rv:
      return

    du = self.node[ru]
    dv = self.node[rv]
    if du <= dv:
      self.node[rv] = ru
      self.node[ru] += dv
    else:
      self.node[ru] = rv
      self.node[rv] += du

n, m, q = map(int, input().split())
edges = []
idx = {}
for _ in range(m):
  a, b = map(int, input().split())
  a -= 1
  b -= 1
  edges.append((a, b))
  idx[a, b] = len(idx)

queries = []
for _ in range(q):
  c, d = map(int, input().split())
  c -= 1
  d -= 1
  queries.append(idx[c, d])

es = set([i for i in range(m)]) - set(queries)
uf = UnionFind(n)
comps = [[] for _ in range(n)]
for e in es:
  a, b = edges[e]
  uf.unite(a, b)

for v in range(n):
  r = uf.root(v)
  comps[r].append(v)

ans = [None for _ in range(n)]
for v in comps[0]:
  ans[v] = -1

for i in range(q - 1, -1, -1):
  c, d = edges[queries[i]]
  rc = uf.root(c)
  rd = uf.root(d)
  if rc == rd:
    continue

  r0 = uf.root(0)
  if r0 == rc:
    for v in comps[rd]:
      ans[v] = i + 1
  elif r0 == rd:
    for v in comps[rc]:
      ans[v] = i + 1

  uf.unite(rc, rd)
  r = uf.root(rc)
  while len(comps[rc + rd - r]) > 0:
    comps[r].append(comps[rc + rd - r].pop())

print(*ans[1:], sep="\n")