#include<bits/stdc++.h>

using namespace std;

void solve() {
    int64_t n, m;
    cin >> n >> m;
    vector<int64_t> a(n + 1);
    for (int64_t i = 1; i <= n; i++)cin >> a[i];
    vector<int64_t> tree(4 * n);
    vector<int64_t> lazy(4 * n);
    auto lz = [&](int64_t p, int64_t s, int64_t t, int64_t x) {
      //  cerr << "Lazy " << p << " " << s << " " << t << " " << x << "\n";
        tree[p] += (t - s + 1) * x;
        lazy[p] += x;
    };
    auto build = [&](auto &&self, int64_t s, int64_t t, int64_t p) {
        if (s == t) {
            tree[p] = a[s];
            return;
        }
        int64_t m = (s+t)/2;
        self(self, s, m, p * 2);
        self(self, m + 1, t, p * 2 + 1);
        tree[p] = tree[p * 2] + tree[p * 2 + 1];
    };
    build(build, 1, n, 1);
    auto query = [&](auto &&self, int64_t l, int64_t r, int64_t s, int64_t t, int64_t p) -> int64_t {
      //  cerr << "query in " << l << " " << r << " " << s << " " << t << "\n";
        int64_t sum = 0;
        if (l <= s && t <= r) return tree[p];
        int64_t m = (s+t)/2;
        if (lazy[p]) {
          // cerr << "Lazy p " << " " << s << " " << t << " " << p << " " << lazy[p] << "\n";
            lz(p * 2, s, m, lazy[p]);
            lz(p * 2 + 1, m + 1, t, lazy[p]);
            lazy[p] = 0;
        }
        if (l <= m) {
            sum += self(self, l, r, s, m, p * 2);
        }
        if (r >= m + 1) {
            sum += self(self, l, r, m + 1, t, p * 2 + 1);
        }
        return sum;
    };
    auto modify = [&](auto &&self, int64_t l, int64_t r, int64_t s, int64_t t, int64_t p, int64_t x) -> void {
//        cerr << "Modify in " << l << " " << r << " " << s << " " << t << " " << p << " " << x << "\n";
        if (l <= s && t <= r) {
            lz(p, s, t, x);
            return;
        }
        int64_t m = s + ((t - s) >> 1);
        if (lazy[p] && s != t) {
           // cerr << "Lazy p " << " " << s << " " << t << " " << p << " " << lazy[p] << "\n";
            lz(p * 2, s, m, lazy[p]);
            lz(p * 2 + 1, m + 1, t, lazy[p]);
            lazy[p] = 0;
        }
        if (l <= m) {
            self(self, l, r, s, m, p * 2, x);
        }
        if (r >= m + 1) {
            self(self, l, r, m + 1, t, p * 2 + 1, x);
        }
        tree[p]=tree[p*2]+tree[p*2+1];
    };
    for (int64_t i = 1; i <= m; i++) {
        int64_t x;
        cin >> x;
        if (x == 1) {
            int64_t l, r, x;
            cin >> l >> r >> x;
            modify(modify, l, r, 1, n, 1, x);
        } else {
            int64_t l, r;
            cin >> l >> r;
            cout << query(query, l, r, 1, n, 1) << "\n";
        }
    }
}

int fact(int x);

int fact(int x)
{
    if(x==0)return 1;
    return fact(x-1)*x;
}

int main() {
    int64_t t;
//    cin>>t;
    t = 1;
    while (t--) {
        solve();
    }

//    struct F
//    {
//        int operator()(int x)const{
//            if(x==0)return 1;
//            return (*this)(x-1)*x;
//        }
//    };
//    F f;

//    auto f=[](auto &&self,int x){
//        if(x==0)return 1;
//        return self(self,x-1)*x;
//    };
    auto f=[](auto &&self,int x){
        if(x==0)return 1;
        return self(self,x-1)*x;
    };
//    f=[](int x){return x+1;};
    f(f,1);

}