from collections import defaultdict

N, M, Q = map(int, input().split())
bridge = defaultdict(int)
for _ in range(M):
    a, b = map(int, input().split())
    bridge[(a, b)] = Q + 1
for i in range(1, Q + 1):
    c, d = map(int, input().split())
    bridge[(c, d)] = i


data = [[i] for i in range(N)]
ans = [0] * N

def find(x):
    if isinstance(data[x], list):
        return x
    data[x] = find(data[x])
    return data[x]

def merge(x, y, time):
    x = find(x)
    y = find(y)
    if x == y:
        return
    if x > y:
        x, y = y, x
    if x == 0:
        while data[y]:
            i = data[y].pop()
            ans[i] = time
            data[x].append(i)
        data[y] = 0
        return
    if len(data[x]) > len(data[y]):
        x, y = y, x
    while data[x]:
        data[y].append(data[x].pop())
    data[x] = y
   

query = [(n, a, b) for (a, b), n in bridge.items()]
query.sort(reverse=True)
for n, a, b in query:
    merge(a - 1, b - 1, n)

for a in ans[1:]:
    if a > Q:
        print(-1)
    else:
        print(a)