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#include <iostream>
#include <vector>
#include <utility>
#include <map>
#include <string>

using namespace std;

int main() {
    string result;
    int numPersons;
    int numEvents;
    cin >> numPersons >> numEvents;

    pair<char, vector<int>> events[numEvents];
    map<int, int> sure_elems;
    map<int, int> not_sure_elems;
    int amountOfPlusEventsRead = 0;

    int first, second;
    char character;
    for(int i = 0; i < numEvents; i++) {

        cin >> character;

        events[i].first = character;


        if(events[i].first == '+') {
            cin >> first >> second;
            events[i].second.push_back(first);
            events[i].second.push_back(second);
        } else {
            cin >> first;
            events[i].second.push_back(first);
        }
    }

    for(int i = 0; i < numEvents; i++) {

        if(not_sure_elems.size() == amountOfPlusEventsRead && amountOfPlusEventsRead > 0) {
            for ( const auto &p : not_sure_elems ) {
                sure_elems[p.first] = 1;
            }
            not_sure_elems.clear();
        }
        if(events[i].first == '-') {
            sure_elems[events[i].second[0]] = 0;
        } else if(events[i].first == '+') {
            amountOfPlusEventsRead++;
            if(events[i].second[0] == events[i].second[1]) {
                sure_elems[events[i].second[0]] = 1;
            } else {
                not_sure_elems[events[i].second[0]]++;
                not_sure_elems[events[i].second[1]]++;
            }
        } else if(events[i].first == '?') {
            auto it = not_sure_elems.find(events[i].second[0]);
            if (it != not_sure_elems.end()) {
                result += "?";
            } else {
                result += to_string(sure_elems[events[i].second[0]]);
            }
        }
    }

    cout << result << "\n";
    return 0;
}