#line 2 "/Users/noya2/Desktop/Noya2_library/template/template.hpp"
using namespace std;

#include<bits/stdc++.h>
#line 1 "/Users/noya2/Desktop/Noya2_library/template/inout_old.hpp"
namespace noya2 {

template <typename T, typename U>
ostream &operator<<(ostream &os, const pair<T, U> &p){
    os << p.first << " " << p.second;
    return os;
}
template <typename T, typename U>
istream &operator>>(istream &is, pair<T, U> &p){
    is >> p.first >> p.second;
    return is;
}

template <typename T>
ostream &operator<<(ostream &os, const vector<T> &v){
    int s = (int)v.size();
    for (int i = 0; i < s; i++) os << (i ? " " : "") << v[i];
    return os;
}
template <typename T>
istream &operator>>(istream &is, vector<T> &v){
    for (auto &x : v) is >> x;
    return is;
}

void in() {}
template <typename T, class... U>
void in(T &t, U &...u){
    cin >> t;
    in(u...);
}

void out() { cout << "\n"; }
template <typename T, class... U, char sep = ' '>
void out(const T &t, const U &...u){
    cout << t;
    if (sizeof...(u)) cout << sep;
    out(u...);
}

template<typename T>
void out(const vector<vector<T>> &vv){
    int s = (int)vv.size();
    for (int i = 0; i < s; i++) out(vv[i]);
}

struct IoSetup {
    IoSetup(){
        cin.tie(nullptr);
        ios::sync_with_stdio(false);
        cout << fixed << setprecision(15);
        cerr << fixed << setprecision(7);
    }
} iosetup_noya2;

} // namespace noya2
#line 1 "/Users/noya2/Desktop/Noya2_library/template/const.hpp"
namespace noya2{

const int iinf = 1'000'000'007;
const long long linf = 2'000'000'000'000'000'000LL;
const long long mod998 =  998244353;
const long long mod107 = 1000000007;
const long double pi = 3.14159265358979323;
const vector<int> dx = {0,1,0,-1,1,1,-1,-1};
const vector<int> dy = {1,0,-1,0,1,-1,-1,1};
const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string alp = "abcdefghijklmnopqrstuvwxyz";
const string NUM = "0123456789";

void yes(){ cout << "Yes\n"; }
void no(){ cout << "No\n"; }
void YES(){ cout << "YES\n"; }
void NO(){ cout << "NO\n"; }
void yn(bool t){ t ? yes() : no(); }
void YN(bool t){ t ? YES() : NO(); }

} // namespace noya2
#line 2 "/Users/noya2/Desktop/Noya2_library/template/utils.hpp"

#line 6 "/Users/noya2/Desktop/Noya2_library/template/utils.hpp"

namespace noya2{

unsigned long long inner_binary_gcd(unsigned long long a, unsigned long long b){
    if (a == 0 || b == 0) return a + b;
    int n = __builtin_ctzll(a); a >>= n;
    int m = __builtin_ctzll(b); b >>= m;
    while (a != b) {
        int mm = __builtin_ctzll(a - b);
        bool f = a > b;
        unsigned long long c = f ? a : b;
        b = f ? b : a;
        a = (c - b) >> mm;
    }
    return a << std::min(n, m);
}

template<typename T> T gcd_fast(T a, T b){ return static_cast<T>(inner_binary_gcd(std::abs(a),std::abs(b))); }

long long sqrt_fast(long long n) {
    if (n <= 0) return 0;
    long long x = sqrt(n);
    while ((x + 1) * (x + 1) <= n) x++;
    while (x * x > n) x--;
    return x;
}

template<typename T> T floor_div(const T n, const T d) {
    assert(d != 0);
    return n / d - static_cast<T>((n ^ d) < 0 && n % d != 0);
}

template<typename T> T ceil_div(const T n, const T d) {
    assert(d != 0);
    return n / d + static_cast<T>((n ^ d) >= 0 && n % d != 0);
}

template<typename T> void uniq(std::vector<T> &v){
    std::sort(v.begin(),v.end());
    v.erase(unique(v.begin(),v.end()),v.end());
}

template <typename T, typename U> inline bool chmin(T &x, U y) { return (y < x) ? (x = y, true) : false; }

template <typename T, typename U> inline bool chmax(T &x, U y) { return (x < y) ? (x = y, true) : false; }

template<typename T> inline bool range(T l, T x, T r){ return l <= x && x < r; }

} // namespace noya2
#line 8 "/Users/noya2/Desktop/Noya2_library/template/template.hpp"

#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define repp(i,m,n) for (int i = (m); i < (int)(n); i++)
#define reb(i,n) for (int i = (int)(n-1); i >= 0; i--)
#define all(v) (v).begin(),(v).end()

using ll = long long;
using ld = long double;
using uint = unsigned int;
using ull = unsigned long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using pil = pair<int,ll>;
using pli = pair<ll,int>;

namespace noya2{

/*　~ (. _________ . /)　*/

}

using namespace noya2;


#line 2 "c.cpp"

#line 2 "/Users/noya2/Desktop/Noya2_library/data_structure/range_tree.hpp"

#line 2 "/Users/noya2/Desktop/Noya2_library/data_structure/compress.hpp"

#line 5 "/Users/noya2/Desktop/Noya2_library/data_structure/compress.hpp"

namespace noya2{

template<typename T>
struct compress {
    std::vector<T> raws;
    compress () {}
    compress (const vector<T> &_raws) : raws(_raws){ build(); }
    void build(){
        std::sort(raws.begin(), raws.end());
        raws.erase(std::unique(raws.begin(), raws.end()), raws.end());
    }
    int id(const T &raw){ return lb(raw); }
    T raw(const int &id){ return raws[id]; }
    void add(const T &raw){ raws.emplace_back(raw); }
    void reserve(size_t sz){ raws.reserve(sz); }
    size_t size(){ return raws.size(); }
    int lb(const T &raw){ return lower_bound(all(raws),raw) - raws.begin(); }
    int ub(const T &raw){ return upper_bound(all(raws),raw) - raws.begin(); }
    bool contains(const T &raw){
        int jd = lb(raw);
        if (jd < (int)size()) return raws[jd] == raw;
        return false;
    }
    int contains_id(const T &raw){
        int jd = lb(raw);
        if (jd < (int)size() && raws[jd] == raw) return jd;
        return -1;
    }
};

} // namespace noya2
#line 5 "/Users/noya2/Desktop/Noya2_library/data_structure/range_tree.hpp"

namespace noya2 {

template<class M, template<class MM> class data_structure, typename Idx = ll>
struct range_tree {
    using DS = data_structure<M>;
    using T = typename M::value_type;
    void join(Idx x, Idx y){ ps.emplace_back(x,y); }
    void build(){
        for (auto &[x, y] : ps) xs.add(x);
        xs.build();
        //siz = bit_ceil(xs.size());
        siz = 1; while (siz < (int)(xs.size())) siz <<= 1;
        ys.resize(siz*2);
        for (auto &[x, y] : ps){
            int xid = xs.id(x) + siz;
            ys[xid].add(y);
            while (xid > 1){
                xid >>= 1;
                ys[xid].add(y);
            }
        }
        for (int i = 0; i < 2*siz; i++){
            ys[i].build();
            ds.emplace_back(ys[i].size());
        }
    }
    void set(Idx p, Idx q, T val){
        int i = xs.id(p) + siz;
        ds[i].set(ys[i].id(q),val);
        while (i > 1){
            i >>= 1;
            T lr = M::e();
            int i0 = ys[2*i+0].contains_id(q), i1 = ys[2*i+1].contains_id(q);
            if (i0 != -1) lr = M::op(lr, ds[2*i+0].get(i0));
            if (i1 != -1) lr = M::op(lr, ds[2*i+1].get(i1));
            ds[i].set(ys[i].id(q),lr);
        }
    }
    T get(Idx p, Idx q){
        int ip = xs.contains_id(p);
        if (ip == -1) return M::e();
        int i = ip + siz;
        int iq = ys[i].contains_id(q);
        if (iq == -1) return M::e();
        return ds[i].get(iq);
    }
    T prod(Idx lp, Idx rp, Idx lq, Idx rq){
        T res = M::e();
        int li = xs.lb(lp), ri = xs.lb(rp);
        for (li += siz, ri += siz; li < ri; li >>= 1, ri >>= 1){
            if (li & 1) res = M::op(res,ds[li].prod(ys[li].lb(lq),ys[li].lb(rq))), ++li;
            if (ri & 1) --ri, res = M::op(res,ds[ri].prod(ys[ri].lb(lq),ys[ri].lb(rq)));
        }
        return res;
    }
    int siz;
    vector<pair<Idx,Idx>> ps;
    compress<Idx> xs;
    vector<compress<Idx>> ys;
    vector<DS> ds;
};

} // namespace noya2
#line 2 "/Users/noya2/Desktop/Noya2_library/data_structure/binary_indexed_tree.hpp"

#line 2 "/Users/noya2/Desktop/Noya2_library/misc/concepts.hpp"

#include<concepts>

namespace noya2 {

template<class monoid>
concept Monoid = requires {
    typename monoid::value_type;
    {monoid::op(declval<typename monoid::value_type>(),declval<typename monoid::value_type>())} -> std::same_as<typename monoid::value_type>;
    {monoid::e()} -> std::same_as<typename monoid::value_type>;
};

template<class group>
concept Group = requires {
    requires Monoid<group>;
    {group::inv(declval<typename group::value_type>())} -> std::same_as<typename group::value_type>;
};

} // namespace noya2
#line 5 "/Users/noya2/Desktop/Noya2_library/data_structure/binary_indexed_tree.hpp"

namespace noya2{

template <Group G>
struct binary_indexed_tree {
    using T = typename G::value_type;
    binary_indexed_tree (int _n = 0) : n(_n), d(_n + 1, G::e()) {}
    void add(int i, T val) {
        for (int x = i+1; x <= n; x += x & -x) {
            d[x] = G::op(d[x],val);
        }
    }
    T prod(int r){
        return prefix_prod(r);
    }
    T prod(int l, int r) {
        return G::op(G::inv(prefix_prod(l)),prefix_prod(r));
    }
    T get(int i){
        return prod(i,i+1);
    }
    void set(int i, T val){
        add(i,G::op(G::inv(get(i)),val));
    }
  private:
    int n;
    std::vector<T> d;
    T prefix_prod(int i) {
        assert(0 <= i && i <= n);
        T ret = G::e();
        for (int x = i; x > 0; x -= x & -x) {
            ret = G::op(ret,d[x]);
        }
        return ret;
    }
};

} // namespace noya2
#line 2 "/Users/noya2/Desktop/Noya2_library/misc/monoids.hpp"

#line 4 "/Users/noya2/Desktop/Noya2_library/misc/monoids.hpp"

namespace noya2{

template<typename T>
struct max_monoid {
    using value_type = T;
    static constexpr T op(const T &a, const T &b){ return max(a,b); }
    static constexpr T e(){ return std::numeric_limits<T>::min(); }
    static constexpr T inv(const T &a){ return e(); }
};
template<typename T>
struct min_monoid {
    using value_type = T;
    static constexpr T op(const T &a, const T &b){ return min(a,b); }
    static constexpr T e(){ return std::numeric_limits<T>::max(); }
    static constexpr T inv(const T &a){ return e(); }
};
template<typename T>
struct plus_group {
    using value_type = T;
    static constexpr T op(const T &a, const T &b){ return a + b; }
    static constexpr T e(){ return T(0); }
    static constexpr T inv(const T &a){ return -a; }
};
template<typename T>
struct xor_group {
    using value_type = T;
    static constexpr T op(const T &a, const T &b){ return a ^ b; }
    static constexpr T e(){ return T(0); }
    static constexpr T inv(const T &a){ return a; }
};

template<class S, auto _op, auto _e>
struct monoid {
    using value_type = S;
    static constexpr value_type op(value_type a, value_type b){
        return _op(a, b);
    }
    static constexpr value_type e(){
        return _e();
    }
};
  
} // namespace noya2
#line 6 "c.cpp"

void solve(){
    int n, q; in(n,q);
    vector<int> a(n); in(a);
    range_tree<plus_group<ll>,binary_indexed_tree,int> rtsum;
    range_tree<plus_group<int>,binary_indexed_tree,int> rtcnt;
    vector<tuple<int,int,int,int>> qs(q);
    rep(i,n){
        rtsum.join(i,a[i]);
        rtcnt.join(i,a[i]);
    }
    rep(i,q){
        int t; in(t);
        if (t == 1){
            int x, y; in(x,y); x--;
            qs[i] = {x,y,-1,-1};
            rtsum.join(x,y);
            rtcnt.join(x,y);
        }
        else {
            int l, r; in(l,r); l--;
            int ly, ry; in(ly,ry);
            qs[i] = {l,r,ly,ry};
        }
    }
    rtsum.build();
    rtcnt.build();
    auto add = [&](int x, int y){
        rtsum.set(x,y,y);
        rtcnt.set(x,y,1);
    };
    auto del = [&](int x, int y){
        rtsum.set(x,y,0);
        rtcnt.set(x,y,0);
    };
    rep(i,n){
        add(i,a[i]);
    }
    for (auto [l,r,ly,ry] : qs){
        if (ly == -1){
            int i = l, x = r;
            del(i,a[i]);
            a[i] = r;
            add(i,a[i]);
        }
        else {
            ll sum = rtsum.prod(l,r,ly,ry);
            ll ucnt = rtcnt.prod(l,r,0,ly);
            ll dcnt = rtcnt.prod(l,r,ry,1000000);
            ll ans = sum + ucnt * ly + dcnt * ry;
            out(ans);
        }
    }
}

int main(){
    int t = 1; //in(t);
    while (t--) { solve(); }
}