#include <iostream>
#include <algorithm>
#include <iomanip>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <tuple>
#include <cmath>
#include <numeric>
#include <functional>
#include <cassert>
#include <atcoder/lazysegtree>

#define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl;
#define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

using namespace std;
typedef long long ll;

template<typename T>
vector<vector<T>> vec2d(int n, int m, T v){
    return vector<vector<T>>(n, vector<T>(m, v));
}

template<typename T>
vector<vector<vector<T>>> vec3d(int n, int m, int k, T v){
    return vector<vector<vector<T>>>(n, vector<vector<T>>(m, vector<T>(k, v)));
}

template<typename T>
void print_vector(vector<T> v, char delimiter=' '){
    if(v.empty()) {
        cout << endl;
        return;
    }
    for(int i = 0; i+1 < v.size(); i++) cout << v[i] << delimiter;
    cout << v.back() << endl;
}

const int inf = 1e9;

int op(int x, int y){
    return min(x, y);
}

int e(){
    return inf;
}

int id(){
    return -1;
}

int mapping(int f, int x){
    if(f == id()) return x;
    return f;
}

int composition(int f, int g){
    if(f == id()) return g;
    return f;
}

using Seg = atcoder::lazy_segtree<int, op, e, int, mapping, composition, id>;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << setprecision(10) << fixed;
    int n, q; cin >> n >> q;
    Seg seg(vector<int>(n-1, 0));
    while(q--){
        int t; cin >> t;
        if(t == 1){
            int l, r; cin >> l >> r; l--; r--;
            seg.apply(l, r, 1);
        }else if(t == 2){
            int l, r; cin >> l >> r; l--; r--;
            seg.apply(l, r, 0);
        }else if(t == 3){
            int u, v; cin >> u >> v; u--; v--;
            if(u > v) swap(u, v);
            if(seg.prod(u, v) == 0){
                cout << 0 << endl;
            }else{
                cout << 1 << endl;
            }
        }else{
            int v; cin >> v; v--;
            auto g = [&](int x){
                return x >= 1;
            };
            int r = seg.max_right(v, g);
            int l = seg.min_left(v, g);
            cout << r-l+1 << endl;
        }
    }
}