#include <bits/stdc++.h>

using namespace std;

int n, k, s[100001], p[100001], s1[100001], p1[100001], a, b;
char h;

int f(int x)
{
    int g = x;
    while (p[g] != g)
        g = p[g];
    return g;
}

int f1(int x)
{
    int g = x;
    while (p1[g] != g)
        g = p1[g];
    return g;
}

int main()
{
    iostream::sync_with_stdio(0); cin.tie(0);
    cin >> n >> k;
    for (int i = 1 ; i <= n ; i++)
    {
        s[i] = 1;
        p[i] = i;
        s1[i] = 1;
        p1[i] = i;
    }
    for (int xx = 0 ; xx < k ; xx++)
    {
        cin >> h >> a >> b;
        int a1 = a, b1 = b;
        if (h == '+')
        {
            a = f(a);
            b = f(b);
            if (a != b)
            {
                if (s[a] < s[b])
                    swap(a, b);
                s[a] += s[b];
                p[b] = a;
            }
            a1 = f1(a1);
            b1 = f1(b1);
            if (a1 == b1)
                continue;
            if (s1[a1] < s1[b1])
                swap(a1, b1);
            s1[a1] += s1[b1];
            p1[b1] = a1;
        }
        else if (h == '-')
        {
            a1 = f1(a1);
            b1 = f1(b1);
            if (a1 == b1)
                continue;
            if (s1[a1] < s1[b1])
                swap(a1, b1);
            s1[a1] += s1[b1];
            p1[b1] = a1;
        }
        else
        {
            a = f(a);
            b = f(b);
            if (a == b)
                cout << "+\n";
            else
            {
                a1 = f1(a1);
                b1 = f1(b1);
                if (a1 == b1)
                    cout << "-\n";
                else
                    cout << "?\n";
            }
        }
    }
    return 0;
}