package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func main() {
	sc.Split(bufio.ScanWords)
	n := nextInt()
	m := nextInt()
	q := nextInt()
	bridge := make([]nodes, m)
	for i := 0; i < m; i++ {
		bridge[i].a = nextInt()
		bridge[i].b = nextInt()
	}
	crashed := make(map[int]bool)
	crash := make([]nodes, q)

	for i := 0; i < q; i++ {
		crash[i].a = nextInt()
		crash[i].b = nextInt()
		crashed[crash[i].a*1000000+crash[i].b] = true
	}

	uf := makeUnionFind(n + 1)
	// 壊れない橋を追加する
	for i := 0; i < m; i++ {
		if crashed[bridge[i].a*1000000+bridge[i].b] {
			continue
		}
		//fmt.Println("追加1: ", bridge[i].a, bridge[i].b)
		uf.Unit(bridge[i].a, bridge[i].b)
	}
	ans := make([]int, n+1)
	for i := 2; i < n+1; i++ {
		if uf.isConnect(1, i) {
			ans[i] = -2
		} else {
			ans[i] = -1
		}
	}
	//fmt.Println("-1ケース, ", ans)
	// 壊れる橋を逆順に追加しながら、つながっているかチェックする
	for i := q - 1; i >= 0; i-- {
		//fmt.Println("追加逆順1:",i,crash[i].a, crash[i].b)

		x := crash[i].a
		y := crash[i].b
		if uf.isConnect(x, y) {
			continue
		}
		if uf.isConnect(1, uf.Find(y)) {
			x, y = y, x
		}
		if uf.isConnect(1, x) {
			for _, h := range uf.has[uf.Find(y)] {
				if ans[h] == -1 {
					ans[h] = i
				}
			}
		}

		uf.Unit(crash[i].a, crash[i].b)
		//fmt.Println("毎回解答:", i, ans)
	}
	for i := 2; i < n+1; i++ {
		fmt.Println(ans[i] + 1)
	}
}

type nodes struct {
	a, b int
}

type UnionFind struct {
	par    []int   // 親
	weight []int   // 重み
	has    [][]int //
}

func makeUnionFind(count int) *UnionFind {
	par := make([]int, count)
	weight := make([]int, count)
	has := makeDoubleSliceInt(count, 1)
	for i := 0; i < count; i++ {
		par[i] = i
		weight[i] = 1
		has[i][0] = i
	}
	return &UnionFind{par: par, weight: weight, has: has}
}

func (uf *UnionFind) Find(a int) int {
	for uf.par[a] != a {
		uf.par[a] = uf.par[uf.par[a]]
		a = uf.par[a]
	}
	return a
}

func (uf *UnionFind) Unit(a, b int) {
	a = uf.Find(a)
	b = uf.Find(b)
	if a == b {
		return
	}
	if uf.weight[a] > uf.weight[b] {
		a, b = b, a
	}
	uf.has[b] = append(uf.has[uf.Find(b)], uf.has[uf.Find(a)]...)
	uf.par[a] = b
	uf.weight[b] += uf.weight[a]
}

func (uf *UnionFind) isConnect(a, b int) bool {
	return uf.Find(a) == uf.Find(b)
}

func makeDoubleSliceInt(y, x int) (r [][]int) {
	r = make([][]int, y)
	for i := range r {
		r[i] = make([]int, x)
	}
	return
}

var sc = bufio.NewScanner(os.Stdin)

func nextLine() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	i, _ := strconv.Atoi(nextLine())
	return i
}