import numpy as np
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

sys.setrecursionlimit(10**8)

N,Q=map(int,readline().split())
*a,=map(int,readline().split())
a = np.array([0]+a)

def F(x,y):
    if x == y:
        return 1
    else:
        return G(a[x],a[x+1])+F(x+1,y)

def G(x,y):
    return x != y

for i in range(Q):
    *q, = map(int,input().split())
    if q[0]==1:
        a[q[1]:q[2]+1] += q[3]
    else:
        print(F(q[1],q[2]))