#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define sp <<" "<<
#define endl "\n"
struct segtree {
int l, r;
int zero;
segtree *left, *right;
void merge() {
zero = left->zero + right->zero;
}
segtree(int l, int r, vector<int> &a) : l(l), r(r) {
if (l == r) {
zero = (a[l] == 0);
left = right = nullptr;
return;
}
int m = (l+r) / 2;
left = new segtree(l, m, a);
right = new segtree(m+1, r, a);
merge();
}
int query(int ql, int qr) {
if (ql > r or qr < l) return 0;
if (ql <= l and r <= qr) return zero;
return left->query(ql, qr) + right->query(ql, qr);
}
};
void solve() {
int n, q; cin >> n >> q;
int sync = 0;
n += sync;
vector<int> a(n), d1, d2;
for (int i = sync; i < n; i++) cin >> a[i];
auto derive = [&](vector<int> &a) -> vector<int> {
vector<int> res(n);
for (int i = 1; i < n; i++) {
res[i] = a[i] - a[i-1];
}
return res;
};
auto print = [&](vector<int> &a) -> void {
for (auto &x : a) {
cerr << x << " ";
} cerr << endl;
};
auto enact = [&]() -> void {
d1 = derive(a);
d2 = derive(d1);
};
auto debug = [&]() -> void {
print(a), print(d1), print(d2);
cerr << endl;
};
enact();
// debug();
segtree st(0, n-1, d2);
int type, l, r, s, c;
while (q--) {
cin >> type;
if (type == 1) {
cin >> l >> r >> s >> c; l--, r--;
l += sync, r += sync;
assert(0);
} else
if (type == 2) {
cin >> l >> r >> s >> c; l--, r--;
l += sync, r += sync;
assert(0);
} else
if (type == 3) {
cin >> l >> r; l--, r--;
l += sync, r += sync;
int sz = (r - l + 1);
cout << min(sz, st.query(l+2, r) + 2) << endl;
}
}
}
signed main() {
cin.tie(0);
ios_base::sync_with_stdio(false);
int t = 1;
// cin >> t;
while (t--)
solve();
}
