using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Numerics;
using System.Threading.Tasks;
using System.Text.RegularExpressions;
using static System.Math;
using MethodImplOptions = System.Runtime.CompilerServices.MethodImplOptions;
using MethodImplAttribute = System.Runtime.CompilerServices.MethodImplAttribute;

public static class P
{
    public static void Main()
    {
        var nq = Console.ReadLine().Split().Select(int.Parse).ToArray();
        var a = Console.ReadLine().Split().Select(int.Parse).ToArray();
        SegmentTree<Segment, long> rcq =
            new SegmentTree<Segment, long>
            (
                a.Select(x => new Segment() { Left = x, Right = x, Res = 1 }).ToArray(),
                new Segment() { Left = -1, Right = -2, Res = 0 },
                0,
                Segment.Merge,
                (x, y) => x + y,
                (x, y) => new Segment() { Left = x.Left + y, Right = x.Right + y, Res = x.Res }
            );
        for (int i = 0; i < nq[1]; i++)
        {
            var query = Console.ReadLine().Split().Select(int.Parse).ToArray();
            if (query[0] == 1)
            {
                rcq.Update(query[1] - 1, query[2] - 1, query[3]);
            }
            else
            {
                Console.WriteLine(rcq.Query(query[1] - 1, query[2] - 1).Res);
            }
        }
    }
}

struct Segment
{
    public long Left;
    public int Res;
    public long Right;
    public static Segment Merge(Segment l, Segment r) => new Segment() { Left = l.Left, Res = l.Res + r.Res + (l.Right == r.Left ? -1 : 0), Right = r.Right };
}

class SegmentTree<DataT, OperatorT>
{
    public readonly int Size;
    DataT DataIdentity;
    OperatorT OperatorIdentity;
    Func<DataT, DataT, DataT> MergeData;
    Func<OperatorT, OperatorT, OperatorT> MergeOperator;
    Func<DataT, OperatorT, DataT> Operate;
    int LeafCount;
    int Height;
    DataT[] Data;
    OperatorT[] Operators;

    #region Construct
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public SegmentTree(int size, DataT dataIdentity, OperatorT operatorIdentity, Func<DataT, DataT, DataT> mergeData, Func<OperatorT, OperatorT, OperatorT> mergeOpeator, Func<DataT, OperatorT, DataT> operate)
        : this(dataIdentity, operatorIdentity, mergeData, mergeOpeator, operate)
    {
        Size = size;
        Build();
        for (int i = 0; i < Data.Length; i++) Data[i] = DataIdentity;
    }
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public SegmentTree(DataT[] data, DataT dataIdentity, OperatorT operatorIdentity, Func<DataT, DataT, DataT> mergeData, Func<OperatorT, OperatorT, OperatorT> mergeOpeator, Func<DataT, OperatorT, DataT> operate)
        : this(dataIdentity, operatorIdentity, mergeData, mergeOpeator, operate)
    {
        Size = data.Length;
        Build();
        for (int i = 0; i < data.Length; i++) Data[i + LeafCount] = data[i];
        for (int i = data.Length + LeafCount; i < Data.Length; i++) Data[i] = dataIdentity;
        for (int i = LeafCount - 1; i >= 0; i--) Data[i] = MergeData(Data[i << 1], Data[(i << 1) + 1]);
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    private SegmentTree(DataT dataIdentity, OperatorT operatorIdentity, Func<DataT, DataT, DataT> mergeData, Func<OperatorT, OperatorT, OperatorT> mergeOpeator, Func<DataT, OperatorT, DataT> operate)
    {
        DataIdentity = dataIdentity;
        OperatorIdentity = operatorIdentity;
        MergeData = mergeData;
        MergeOperator = mergeOpeator;
        Operate = operate;
    }
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    private void Build()
    {
        Height = 1;
        LeafCount = 1;
        while (LeafCount < Size) { Height++; LeafCount <<= 1; }
        Operators = new OperatorT[LeafCount << 1];
        for (int i = 0; i < Operators.Length; i++) Operators[i] = OperatorIdentity;
        Data = new DataT[LeafCount << 1];
    }
    #endregion

    public DataT this[int index]
    {
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        get { Propagate(index + LeafCount); return Reflect(index); }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        set { Propagate(index += LeafCount); Data[index] = value; Operators[index] = OperatorIdentity; Calculate(index, index); }
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public void Update(int l, int r, OperatorT x)
    {
        l += LeafCount;
        r += LeafCount;
        int origL = l, origR = r;
        Propagate(l, r);
        while (l <= r)
        {
            if ((l & 1) == 1) Operators[l] = MergeOperator(Operators[l], x);
            if ((r & 1) == 0) Operators[r] = MergeOperator(Operators[r], x);
            l = (l + 1) >> 1; r = (r - 1) >> 1;
        }
        Calculate(origL, origR);
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public DataT Query(int l, int r)
    {
        l += LeafCount;
        r += LeafCount;
        DataT lRes = DataIdentity, rRes = DataIdentity;
        Propagate(l, r);
        while (l <= r)
        {
            if ((l & 1) == 1) lRes = MergeData(lRes, Reflect(l));
            if ((r & 1) == 0) rRes = MergeData(Reflect(r), rRes);
            l = (l + 1) >> 1; r = (r - 1) >> 1;
        }
        return MergeData(lRes, rRes);
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    private void Propagate(int ind) { for (int i = Height - 1; i >= 1; i--) { Eval(ind >> i); } return; }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    private void Propagate(int l, int r)
    {
        if (l == r) { Propagate(l); return; }
        int xor = l ^ r, i = Height - 1;
        for (; (xor >> i) == 0; i--) { Eval(l >> i); }
        for (; i >= 1; i--) { Eval(l >> i); Eval(r >> i); }
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    private DataT Reflect(int ind) { return Operate(Data[ind], Operators[ind]); }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    private void Eval(int ind)
    {
        int l = ind << 1, r = ind << 1 | 1;
        Operators[l] = MergeOperator(Operators[l], Operators[ind]);
        Operators[r] = MergeOperator(Operators[r], Operators[ind]);
        Data[ind] = Reflect(ind);
        Operators[ind] = OperatorIdentity;
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    private void Calculate(int l, int r)
    {
        var xor = l ^ r;
        while (xor > 1) { xor >>= 1; l >>= 1; r >>= 1; Data[l] = MergeData(Reflect(l << 1), Reflect((l << 1) | 1)); Data[r] = MergeData(Reflect(r << 1), Reflect((r << 1) | 1)); }
        while (l > 1) { l >>= 1; Data[l] = MergeData(Reflect(l << 1), Reflect((l << 1) | 1)); }
    }
}