#include <bits/stdc++.h>

using namespace std;

using ll = long long;

template <class Monoid>
struct SegmentTree {
    using T = typename Monoid::T;

    int n;
    vector<T> data;

    SegmentTree(int size, T initial_value = Monoid::identity()) {
        n = 1;
        while (n < size) n *= 2;
        data.resize(2 * n - 1, initial_value);
    }

    SegmentTree(const vector<T>& v, T initial_value = Monoid::identity()) {
        int size = v.size();
        n = 1;
        while (n < size) n *= 2;
        data.resize(2 * n - 1, initial_value);

        for (int i = 0; i < size; i++) data[i + n - 1] = v[i];
        for (int i = n - 2; i >= 0; i--) data[i] = Monoid::merge(data[i * 2 + 1], data[i * 2 + 2]);
    }

    T getLeaf(int k) {
        return data[k + n - 1];
    }

    void update(int k, T x) {
        k += n - 1; //葉の節点
        Monoid::update(data[k], x);
        while (k > 0) {
            k = (k - 1) / 2;
            data[k] = Monoid::merge(data[k * 2 + 1], data[k * 2 + 2]);
        }
    }

    //区間[a, b)に対するクエリに答える
    //k:節点番号, [l, r):節点に対応する区間
    T query(int a, int b, int k, int l, int r) {
        //[a, b)と[l, r)が交差しない場合
        if (r <= a || b <= l) return Monoid::identity();
        //[a, b)が[l, r)を含む場合、節点の値
        if (a <= l && r <= b) return data[k];
        else {
            //二つの子をマージ
            T vl = query(a, b, k * 2 + 1, l, (l + r) / 2);
            T vr = query(a, b, k * 2 + 2, (l + r) / 2, r);
            return Monoid::merge(vl, vr);
        }
    }

    //外から呼ぶ用
    T query(int a, int b) {
        return query(a, b, 0, 0, n);
    }

    //非再帰版: バグってるかもしれないので定数倍高速化する時以外使わないで
    //区間[a, b)に対するクエリに答える
    T query_fast(int a, int b) {
        T vl = Monoid::identity(), vr = Monoid::identity();
        for (int l = a + n, r = b + n; l != r; l >>= 1, r >>= 1) {
            if (l & 1) vl = Monoid::merge(vl, data[l++ - 1]);
            if (r & 1) vr = Monoid::merge(data[--r - 1], vr);
        }
        return Monoid::merge(vl, vr);
    }
};

// 以下、Monoidの例
template <class U = ll>
struct RangeMax {
    using T = U;
    static T merge(T x, T y) { return max(x, y); }
    static void update(T& target, T x) { target = x; }
    static constexpr T identity() { return T(0); }
};

template <class U = ll>
struct RangeSum {
    using T = U;
    static T merge(T x, T y) { return x + y; }
    static void update(T& target, T x) { target = x; }
    static constexpr T identity() { return T(0); }
};

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n, q;
    cin >> n >> q;
    vector<ll> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }

    vector<int> v(n - 1, 0);
    for (int i = 0; i < n - 1; i++) {
        a[i] = a[i + 1] - a[i];
        v[i] = (a[i] != 0);
    }
    a[n - 1] = 0;

    SegmentTree< RangeSum<int> > st(v);
    for (int i = 0; i < q; i++) {
        int c, l, r;
        cin >> c >> l >> r;
        l--;
        if (c == 1) {
            ll x;
            cin >> x;
            if (l > 0) {
                a[l - 1] += x;
                st.update(l - 1, (a[l - 1] != 0));
            }
            r--;
            if (r < n - 1) {
                a[r] -= x;
                st.update(r, (a[r] != 0));
            }
        } else {
            r--;
            cout << st.query(l, r) + 1 << endl;
        }
    }
    return 0;
}