n, m, q = map(int, input().split())
es = [tuple(map(int, input().split())) for _ in range(m)]
qs = [tuple(map(int, input().split())) for _ in range(q)]
vs = [[i] for i in range(n+1)]
def find(i):
    if vs[i][0] == i:
        return i
    j = find(vs[i][0])
    vs[i] = vs[j]
    return j
def union(i, j):
    if vs[i] is vs[j]:
        return
    if len(vs[i]) < len(vs[j]):
        i, j = j, i
    vs[i] += vs[j]
    vs[j] = vs[i]
s = set(qs)
for i, j in es:
    if (i,j) not in s:
        union(find(i), find(j))
res = [-1]*(n+1)
for i, j in qs[::-1]:
    q -= 1
    i = find(i)
    j = find(j)
    if i == j:
        continue
    k = find(1)
    if j == k:
        i, j = j, i
    if i == k:
        for v in vs[j]:
            res[v] = q + 1
    union(i, j)
for i in res[2:]:
    print(i)