//
// Created by darian on 18.06.24.
//

#include <bits/stdc++.h>
using namespace std;
using ll = long long;



void update_range(int a, int b, ll k, vector<ll> &dif) {
    dif[a] += k;
    if (b != dif.size() - 1) {
        dif[b+1] -= k;
    }
}


int main() {
    int n, q; cin >> n >> q;
    vector<ll> input(n);
    vector<ll> difference;
    for (auto &e: input){
        cin >> e;
        if (difference.size()) difference.push_back(e - input.back());
        else difference.push_back(e);
    }

    for (int i{}; i < q; i++) {
        int t; cin >> t;
        if (t == 1) {
            int a, b; ll u; cin >> a >> b >> u;
            a--; b--;
            update_range(a, b, u, difference);
        }
    }

}