#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e5 + 10;
vector<int> adj[maxn], seg[4*maxn];
set<int> res;
array<int, 2> e[maxn];
int n, m, q, ban[maxn], in[maxn], qu[maxn], ans[maxn];
map<int,int> ex;

void add(int val, int l, int r, int id = 1, int lx = 1, int rx = q)
{
    if (lx > r || rx < l) return;
    if (lx >= l && rx <= r) return void(seg[id].emplace_back(val));
    add(val, l, r, id<<1, lx, (lx+rx)>>1);
    add(val, l, r, id<<1|1, ((lx+rx)>>1) + 1, rx);
}

inline void upd(int i)
{
    for (int id: adj[i]) if (!ban[id])
    {
        int j = e[id][0] ^ e[id][1] ^ i;
        if (in[j]) res.erase(id);
        else res.emplace(id);
    }
    in[i] = 1;
}

inline void rupd(int i)
{
    for (int id: adj[i]) if (!ban[id])
    {
        int j = e[id][0] ^ e[id][1] ^ i;
        if (in[j]) res.emplace(id);
        else res.erase(id);
    }
    in[i] = 0;
}

void solve(int id = 1, int l = 1, int r = q)
{
    for (int i: seg[id]) upd(i);
    if (l == r)
    {
        if (qu[l]) 
        {
            ans[l] = res.size() ? *res.begin() : 0;
            if (res.count(ans[l])) res.erase(ans[l]);
            ban[ans[l]] = 1;
        }
        for (int i: seg[id]) rupd(i);
        return;
    }
    solve(id<<1, l, (l+r)>>1);
    solve(id<<1|1, ((l+r)>>1) + 1, r);
    for (int i: seg[id]) rupd(i);
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    if (fopen("input.in", "r")) {
        freopen("input.in", "r", stdin);
        freopen("output.out", "w", stdout);
    }
    cin>>n>>m;
    for (int i=1; i<=m; i++) cin>>e[i][0]>>e[i][1], adj[e[i][0]].emplace_back(i), adj[e[i][1]].emplace_back(i);
    cin>>q;
    for (int i=1; i<=q; i++)
    {
        char c; int x;
        cin>>c;
        if (c == '?') qu[i] = 1;
        else 
        {
            cin>>x;
            if (!ex.count(x)) ex[x] = i;
            else 
            {
                // cout<<"ADD: "<<x<<" "<<ex[x]<<" "<<i-1<<"\n";
                add(x, ex[x], i-1), ex.erase(x);
            }
        }
    }
    for (auto [u, v]: ex) 
    {
        // cout<<"ADD: "<<u<<" "<<v<<" "<<q<<"\n";
        add(u, v, q);
    }
    // cout<<"2\n3\n4\n5\n0\n1\n0";
    solve();
    for (int i=1; i<=q; i++) if (qu[i] == 1) cout<<ans[i]<<"\n";
}