#include<iomanip>
#include<limits>
#include<thread>
#include<utility>
#include<iostream>
#include<string>
#include<algorithm>
#include<set>
#include<map>
#include<vector>
#include<stack>
#include<queue>
#include<cmath>
#include<math.h>
#include<numeric>
#include<cassert>
#include<random>
#include<deque>
#include<chrono>
#include<unordered_map>
#include<list>
#include<fstream>
using namespace std;
typedef unsigned long long int ull;
typedef long long int ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pi;
typedef pair<double,double> pd;
const ll E=1e18+7;
#define F first
#define S second
#define MK make_pair
const ll MOD=1000000007;

//nodeに値がある場合
template<typename T,typename U> //T::要素,U::作用素
class HLD{
private:
    //0-index
    class late_seg_tree{
    private:
        typedef pair<T,U> node;
        vector<vector<node>> tree;
        ll high;
        T err_T;
        U err_U;
        ll err;
        
        T F(T,T); //要素のマージ (要素,要素)
        T G(T,U,ll); //作用素->要素 (要素,作用素,場所)
        U H(U,U); //作用素のマージ (作用素,作用素)
        T I(T,U,ll,ll); //作用素->区間要素 (要素,作用素,l,r) [l,r)
        
        ll bit_size(ll a){
            for(int i=1;i<63;i++){
                if(1<<i >= a){return i;}
            }
            return err;
        }
        
        //[l,r)
        void update(ll h,ll where,ll l,ll r,U u){
            ll L=where<<(high-h-1);
            ll R=(where+1)<<(high-h-1);
            if(r<=L || R<=l){return;}
            if(h==high-1){tree[h][where].F=G(tree[h][where].F,u,where); return;}
            if(l<=L && R<=r){
                tree[h][where].S=H(tree[h][where].S,u);
                tree[h][where].F=F(tree[h+1][where*2].F,tree[h+1][where*2+1].F);
                tree[h][where].F=I(tree[h][where].F,tree[h][where].S,L,R);
            }
            else{
                update(h+1,where*2,l,r,u);
                update(h+1,where*2+1,l,r,u);
                tree[h][where].F=F(tree[h+1][where*2].F,tree[h+1][where*2+1].F);
                tree[h][where].F=I(tree[h][where].F,tree[h][where].S,L,R);
            }
        }
        
        T search(ll h,ll where,ll l,ll r){
            ll L=where<<(high-h-1);
            ll R=(where+1)<<(high-h-1);
            if(r<=L || R<=l){return err_T;}
            if(h==high-1){return tree[h][where].F;}
            if(l<=L && R<=r){return tree[h][where].F;}
            else{
                update(h+1,where*2,L,R,tree[h][where].S);
                update(h+1,where*2+1,L,R,tree[h][where].S);
                tree[h][where].S=err_U;
                T ret=err_T;
                ret=F(ret,search(h+1,where*2,l,r));
                ret=F(ret,search(h+1,where*2+1,l,r));
                return ret;
            }
            return err_T;
        }
        
    public:
        late_seg_tree(ull size,T err_T,U err_U):err_T(err_T),err_U(err_U){
            err=1e18+7;
            high=bit_size(size)+1;
            tree.resize(high);
            for(int i=0;i<high;i++){
                tree[i].resize(1<<i,{err_T,err_U});
            }
        }
        
        late_seg_tree(vector<T> t,T err_T,U err_U):err_T(err_T),err_U(err_U){
            err=1e18+7;
            high=bit_size(t.size())+1;
            tree.resize(high);
            for(int i=0;i<high;i++){
                tree[i].resize(1<<i,{err_T,err_U});
            }
            for(int i=0;i<t.size();i++){
                tree[high-1][i]={t[i],err_U};
            }
            for(ll h=high-2;h>=0;h--){
                for(int i=0;i<tree[h].size();i++){
                    tree[h][i].F=F(tree[h+1][i*2].F,tree[h+1][i*2+1].F);
                }
            }
        }
        
        void update(ll l,ll r,U u){
            update(0,0,l,r,u);
        }
        
        T search(ll l,ll r){
            return search(0,0,l,r);
        }
    };
    
    class LCA{
    private:
        typedef pair<ll,vector<ll>> node; //depth,parents
        ll root;
        ll v;
        vector<node> tree;
        vector<vector<ll>> E;
        ll High; //高さのlog
        
        void bfs(){
            tree[root]={0,{root}};
            queue<ll> q;
            q.push(root);
            vector<bool> done(v,false);
            while(!q.empty()){
                ll where=q.front();
                q.pop();
                if(done[where]){continue;}
                done[where]=true;
                for(int i=0;i<E[where].size();i++){
                    if(!done[E[where][i]]){
                        tree[E[where][i]].F=tree[where].F+1;
                        tree[E[where][i]].S={where};
                        q.push(E[where][i]);
                    }
                }
            }
        }
        
    public:
        LCA(ll v,ll root):v(v),root(root){
            tree.resize(v);
            E.resize(v);
        }
        
        //双方向のエッジでもよい
        void add_edge(ll from,ll to){
            E[from].push_back(to);
        }
        
        //searchの前に行う
        void mk_tree(){
            bfs();
            bool j=true;
            for(int i=0;j;i++){
                j=false;
                for(int t=0;t<v;t++){
                    ll P=tree[t].S[i];
                    P=tree[P].S[i];
                    tree[t].S.push_back(P);
                    if(P!=root){j=true;}
                }
            }
            High=tree[root].S.size();
        }
        
        ll search_parent(ll a,ll h){
            if(tree[a].F<=h){return root;}
            for(ll i=High-1;i>=0;i--){
                if((1<<i)&h){a=tree[a].S[i];}
            }
            return a;
        }
        
        ll search_lca(ll a,ll b){
            ll dif=tree[a].F-tree[b].F;
            if(0>dif){swap(a,b); dif=abs(dif);}
            a=search_parent(a,dif);
            for(ll i=High-1;i>=0;i--){
                if(tree[a].S[i]!=tree[b].S[i]){
                    a=tree[a].S[i];
                    b=tree[b].S[i];
                }
            }
            while(a!=b){
                a=tree[a].S[0];
                b=tree[b].S[0];
            }
            return a;
        }
        
        ll high(ll a){
            return tree[a].F;
        }
    };
    
    struct node{
        ll high;
        ll children;
        ll edge_number;
        ll parent;
        vector<ll> child;
        T a;
    };
    
    struct Edge{
        ll parent;
        ll high;
        ll low;
        ll begin;
        ll end;
        late_seg_tree seg;
    };
    
    bool made;
    ll v;
    ll root;
    vector<node> nodes;
    LCA lca;
    vector<Edge> E;
    T err_T;
    U err_U;
    vector<vector<ll>> edge;
    T F(T,T); //要素のマージ (要素,要素)
    U P(U,ll,ll,bool); //作用素->セグ木の作用素 (作用素、エッジの始点の高さ、エッジの終点の高さ、向き) true::down false::up
    
    bool err(const node &a)const{
        if(a.high==-1 && a.children==-1 && a.edge_number==-1 && a.parent==-1 && a.child==vector<ll>()){return true;}
        return false;
    }
    
    ll dfs(ll where){
        ll count=0;
        for(int i=0;i<edge[where].size();i++){
            if(err(nodes[edge[where][i]])){
                nodes[where].child.push_back(edge[where][i]);
                nodes[edge[where][i]].parent=where;
                nodes[edge[where][i]].high=nodes[where].high+1;
                count+=dfs(edge[where][i]);
            }
        }
        count++;
        nodes[where].children=count;
        return count;
    }
    
    void MK_TREE(){
        if(made){return;}
        made=true;
        lca.mk_tree();
        nodes[root].parent=root;
        nodes[root].high=0;
        dfs(root);
        ll count=0;
        stack<ll> s;
        s.push(root);
        while(!s.empty()){
            ll w=s.top();
            s.pop();
            if(nodes[w].edge_number!=-1){continue;}
            ll where=w;
            ll parent=nodes[w].parent;
            vector<T> tree;
            ll end=-1;
            while(1){
                tree.push_back(nodes[where].a);
                nodes[where].edge_number=count;
                if(nodes[where].children==1){end=where; break;}
                ll mx=0;
                ll to=-1;
                for(int i=0;i<nodes[where].child.size();i++){
                    ll t=nodes[where].child[i];
                    if(nodes[t].children>mx){mx=nodes[t].children; to=t;}
                    s.push(t);
                }
                where=to;
            }
            E.push_back({parent,nodes[w].high,nodes[end].high,w,end,late_seg_tree(tree,err_T,err_U)});
            count++;
        }
    }
    
    //[low,high]
    void up_update(ll where,ll low,ll high,U u){
        ll High=E[where].high;
        ll Low=E[where].low;
        u=P(u,High,Low,false);
        high=max(High,high);
        low=min(Low,low);
        high-=High;
        low-=High;
        E[where].seg.update(high,low+1,u);
    }
    
    //[high,low]
    void down_update(ll where,ll high,ll low,U u){
        ll High=E[where].high;
        ll Low=E[where].low;
        u=P(u,High,Low,true);
        high=max(High,high);
        low=min(Low,low);
        high-=High;
        low-=High;
        E[where].seg.update(high,low+1,u);
    }
    
    void UPDATE(ll s,ll t,U u){
        ll mid=lca.search_lca(s,t);
        if(s!=mid){
            ll w=s;
            ll high=nodes[mid].high+1;
            while(1){
                ll low=nodes[w].high;
                ll where=nodes[w].edge_number;
                if(low<high){break;}
                up_update(where,low,high,u);
                w=E[where].parent;
            }
        }
        ll w=t;
        ll high=nodes[mid].high;
        while(1){
            ll low=nodes[w].high;
            ll where=nodes[w].edge_number;
            if(low<high){break;}
            down_update(where,high,low,u);
            if(where==0){break;}
            w=E[where].parent;
        }
    }
    
    //[low,high]
    T up_search(ll where,ll low,ll high){
        ll High=E[where].high;
        ll Low=E[where].low;
        high=max(High,high);
        low=min(Low,low);
        high-=High;
        low-=High;
        return E[where].seg.search(high,low+1);
    }
    
    //[high,low]
    T down_search(ll where,ll high,ll low){
        ll High=E[where].high;
        ll Low=E[where].low;
        high=max(High,high);
        low=min(Low,low);
        high-=High;
        low-=High;
        return E[where].seg.search(high,low+1);
    }
    
    T SEARCH(ll s,ll t){
        T ret=err_T;
        ll mid=lca.search_lca(s,t);
        if(s!=mid){
            ll w=s;
            ll high=nodes[mid].high+1;
            while(1){
                ll low=nodes[w].high;
                ll where=nodes[w].edge_number;
                if(low<high){break;}
                ret=F(ret,up_search(where,low,high));
                w=E[where].parent;
            }
        }
        ll w=t;
        ll high=nodes[mid].high;
        while(1){
            ll low=nodes[w].high;
            ll where=nodes[w].edge_number;
            if(low<high){break;}
            ret=F(ret,down_search(where,high,low));
            if(where==0){break;}
            w=E[where].parent;
        }
        return ret;
    }
    
public:
    HLD(ll v,ll root,T err_T,U err_U):v(v),root(root),err_T(err_T),err_U(err_U),lca(v,root){
        edge.resize(v);
        nodes.resize(v,{-1,-1,-1,-1,{},err_T});
        made=false;
    }
    
    HLD(ll v,ll root,vector<T> t,T err_T,U err_U):v(v),root(root),err_T(err_T),err_U(err_U),lca(v,root){
        lca(v,root);
        edge.resize(v);
        nodes.resize(v,{-1,-1,-1,-1,{},err_T});
        made=false;
        for(int i=0;i<v;i++){
            nodes[i].a=t[i];
        }
    }
    
    //無向
    void add_edge(ll from,ll to){
        edge[from].push_back(to);
        edge[to].push_back(from);
        lca.add_edge(from,to);
        lca.add_edge(to,from);
    }
    
    void update(ll from,ll to,U u){
        MK_TREE();
        UPDATE(from,to,u);
    }
    
    T search(ll s,ll t){
        MK_TREE();
        return SEARCH(s,t);
    }
};



int main(){
    ll n;
    cin>>n;
    HLD<ll,ll> tree(n,0,0,0);
    for(int i=1;i<n;i++){
        tree.add_edge(i,i-1);
    }
    ll q;
    cin>>q;
    while(q--){
        ll c;
        cin>>c;
        if(c){
            ll s,t;
            cin>>s>>t;
            s--; t--;
            cout<<tree.search(s,t)<<endl;
        }
        else{
            ll a,b,x;
            cin>>a>>b>>x;
            a--; b--;
            tree.update(a,b,x);
        }
    }
    
    
    return 0;
}

//区間加算、区間和
//要素のマージ (要素,要素)
template<typename T,typename U>
T HLD<T,U>::F(T a,T b){
    return a+b;
}

//作用素->セグ木の作用素 (作用素、エッジの始点の高さ、エッジの終点の高さ、向き) true::down false::up
template<typename T,typename U>
U HLD<T,U>::P(U u,ll high,ll low,bool f){
    return u;
}

template<typename T,typename U>
T HLD<T,U>::late_seg_tree::F(T a,T b){
    return a+b;
}

template<typename T,typename U>
T HLD<T,U>::late_seg_tree::G(T a,U b,ll where){
    return a+b;
}

template<typename T,typename U>
U HLD<T,U>::late_seg_tree::H(U a,U b){
    return a+b;
}

template<typename T,typename U>
T HLD<T,U>::late_seg_tree::I(T a,U b,ll l,ll r){
    return a+b*(r-l);
}



Measured memory_bytes: 65468