#include <bits/stdc++.h>

//    #include <boost/multiprecision/cpp_int.hpp>
 #define int long long
 #define inf  1000000007
 #define pa pair<int,int>
 #define ll long long
 #define pal pair<double,double>
 #define ppap pair<pa,int>
  #define PI 3.14159265358979323846
  #define paa pair<int,char>
  #define  mp make_pair
  #define  pb push_back
  #define EPS (1e-10)
                                          
    int dx[8]={0,1,0,-1,1,1,-1,-1};
    int dy[8]={1,0,-1,0,-1,1,1,-1};
                                            using namespace std;
                                   			class pa3{
                                            	public:
                                            	int x;
                                   				int y,z;
                                            	pa3(int x=0,int y=0,int z=0):x(x),y(y),z(z) {}
                                            	bool operator < (const pa3 &p) const{
                                            		if(x!=p.x) return x<p.x;
                                            		if(y!=p.y) return y<p.y;
                                            		 return z<p.z;
                                            		//return x != p.x ? x<p.x: y<p.y;
                                            	}
                                   				bool operator > (const pa3 &p) const{
                                            		if(x!=p.x) return x>p.x;
                                            		if(y!=p.y) return y>p.y;
                                            		 return z>p.z;
                                            		//return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator == (const pa3 &p) const{
                                            		return x==p.x && y==p.y && z==p.z;
                                            	}
                                            		bool operator != (const pa3 &p) const{
                                            			return !( x==p.x && y==p.y && z==p.z);
                                            	}
                                            
                                            };
                                            
                                            class pa4{
                                            	public:
                                            	int x;
                                            	int y,z,w;
                                            	pa4(int x=0,int y=0,int z=0,int w=0):x(x),y(y),z(z),w(w) {}
                                            	bool operator < (const pa4 &p) const{
                                            		if(x!=p.x) return x<p.x;
                                            		if(y!=p.y) return y<p.y;
                                            		if(z!=p.z)return z<p.z;
                                            		return w<p.w;
                                            		//return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator > (const pa4 &p) const{
                                            		if(x!=p.x) return x>p.x;
                                            		if(y!=p.y) return y>p.y;
                                            		if(z!=p.z)return z>p.z;
                                            		return w>p.w;
                                            		//return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator == (const pa4 &p) const{
                                            		return x==p.x && y==p.y && z==p.z &&w==p.w;
                                            	}
                                            		
                                            
                                            };
                                            class pa2{
                                            	public:
                                            	int x,y;
                                            	pa2(int x=0,int y=0):x(x),y(y) {}
                                            	pa2 operator + (pa2 p) {return pa2(x+p.x,y+p.y);}
                                            	pa2 operator - (pa2 p) {return pa2(x-p.x,y-p.y);}
                                            	bool operator < (const pa2 &p) const{
                                            		return y != p.y ? y<p.y: x<p.x;
                                            	}
                                            	bool operator > (const pa2 &p) const{
                                            		return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator == (const pa2 &p) const{
                                            		return abs(x-p.x)==0 && abs(y-p.y)==0;
                                            	}
                                            	bool operator != (const pa2 &p) const{
                                            		return !(abs(x-p.x)==0 && abs(y-p.y)==0);
                                            	}
                                            		
                                            
                                            };
                                        

                                            class Point{
                                            	public:
                                            	double x,y;
                                            	Point(double x=0,double y=0):x(x),y(y) {}
                                            	Point operator + (Point p) {return Point(x+p.x,y+p.y);}
                                            	Point operator - (Point p) {return Point(x-p.x,y-p.y);}
                                            	Point operator * (double a) {return Point(x*a,y*a);}
                                            	Point operator / (double a) {return Point(x/a,y/a);}
                                            	double absv() {return sqrt(norm());}
                                            	double norm() {return x*x+y*y;}
                                            	bool operator < (const Point &p) const{
                                            		return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator == (const Point &p) const{
                                            		return fabs(x-p.x)<EPS && fabs(y-p.y)<EPS;
                                            	}
                                            };
                                            typedef Point Vector;
                                     #define pl pair<int,pas>
                                            struct Segment{
                                            Point p1,p2;
                                            };
                                             double dot(Vector a,Vector b){
                                            	return a.x*b.x+a.y*b.y;
                                            }
                                            double cross(Vector a,Vector b){
                                            	return a.x*b.y-a.y*b.x;
                                            }
                                        
                bool parareru(Point a,Point b,Point c,Point d){
                //	if(abs(cross(a-b,d-c))<EPS)cout<<"dd "<<cross(a-b,d-c)<<endl;
                	return abs(cross(a-b,d-c))<EPS;
                }
                double distance_ls_p(Point a, Point b, Point c) {
                  if ( dot(b-a, c-a) < EPS ) return (c-a).absv();
                  if ( dot(a-b, c-b) < EPS ) return (c-b).absv();
                  return abs(cross(b-a, c-a)) / (b-a).absv();
                }
                bool is_intersected_ls(Segment a,Segment b) {
                	if(a.p1==b.p1||a.p2==b.p1||a.p1==b.p2||a.p2==b.p2) return false;
                	if(parareru((a.p2),(a.p1),(a.p1),(b.p2))&&parareru((a.p2),(a.p1),(a.p1),(b.p1))){
                //		cout<<"sss"<<endl;
                		if(dot(a.p1-b.p1,a.p1-b.p2)<EPS) return true;
                		if(dot(a.p2-b.p1,a.p2-b.p2)<EPS) return true;
                		if(dot(a.p1-b.p1,a.p2-b.p1)<EPS) return true;
                		if(dot(a.p1-b.p2,a.p2-b.p2)<EPS) return true;
                		return false;
                	}
                  else return ( cross(a.p2-a.p1, b.p1-a.p1) * cross(a.p2-a.p1, b.p2-a.p1) < EPS ) && ( cross(b.p2-b.p1, a.p1-b.p1) * cross(b.p2-b.p1, a.p2-b.p1) < EPS );
                }
                 
                double segment_dis(Segment a,Segment b){
                	if(is_intersected_ls(a,b))return 0;
                	double r=distance_ls_p(a.p1, a.p2, b.p1);
                	r=min(r,distance_ls_p(a.p1, a.p2, b.p2));
                	r=min(r,distance_ls_p(b.p1, b.p2, a.p2));
                	r=min(r,distance_ls_p(b.p1, b.p2, a.p1));
                	return r;
                }
                Point intersection_ls(Segment a, Segment b) {
                  Point ba = b.p2-b.p1;
                  double d1 = abs(cross(ba, a.p1-b.p1));
                  double d2 = abs(cross(ba, a.p2-b.p1));
                  double t = d1 / (d1 + d2);
                 
                  return a.p1 + (a.p2-a.p1) * t;
                }
                
                                string itos( int i ) {
                                ostringstream s ;
                                s << i ;
                                return s.str() ;
                                }
                                 
                                int gcd(int v,int b){
                                	if(v>b) return gcd(b,v);
                                	if(v==b) return b;
                                	if(b%v==0) return v;
                                	return gcd(v,b%v);
                                }
                 
                                double distans(double x1,double y1,double x2,double y2){
                                	double rr=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2);
                                	return sqrt(rr);
                                	
                                }
                                int mod;
ll extgcd(ll a, ll b, ll &x, ll &y) {
    if (b == 0ll) {
        x = 1ll;
        y = 0ll;
        return a;
    }
    ll d = extgcd(b, a%b, y, x);
    y -= a/b * x;
    return d;
}
pa operator+(const pa & l,const pa & r) {   
    return {l.first+r.first,l.second+r.second};                                    
}    
pa operator-(const pa & l,const pa & r) {   
    return {l.first-r.first,l.second-r.second};                                    
} 
                                
                int pr[1200010];
                int inv[1200010];
                
                int beki(int wa,int rr,int warukazu){
                	if(rr==0) return 1%warukazu;
                	if(rr==1) return wa%warukazu;
                	wa%=warukazu;
                	if(rr%2==1) return ((ll)beki(wa,rr-1,warukazu)*(ll)wa)%warukazu;
                	ll zx=beki(wa,rr/2,warukazu);
                	return (zx*zx)%warukazu;
                }
    double bekid(double w,int r){
    	if(r==0) return 1.0;
    	if(r==1) return w;
    	if(r%2) return bekid(w,r-1)*w;
    	double f=bekid(w,r/2);
    	return f*f;
    }
                
    			int comb(int nn,int rr){
    				int r=pr[nn]*inv[rr];
    				r%=mod;
    				r*=inv[nn-rr];
    				r%=mod;
    				return r;
    			}
                
                void gya(int ert){
                	pr[0]=1;
                	for(int i=1;i<=ert;i++){
                		pr[i]=(pr[i-1]*i)%mod;
                	}
                	for(int i=0;i<=ert;i++) inv[i]=beki(pr[i],mod-2,mod);
                	
                }
                
              //   cin.tie(0);
    		//	ios::sync_with_stdio(false);
    			//priority_queue<pa3,vector<pa3>,greater<pa3>> pq;            
                 //sort(ve.begin(),ve.end(),greater<int>());
    //mt19937(clock_per_sec);
  //  mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()) ;
	   
       
                               //----------------kokomade tenpure------------



struct seg_zenbu{
	//       1
	//   2        3
	// 4   5   6    7
	
	
	private:
	public:
	
	// (1<<15)=32768
	// 1<<16 = 65536
	// 1<<17 = 131072
	// 1<<18 = 262144
	
	int cor=(1<<17);
	int max_inf=inf*1000000ll;
	int min_inf=-max_inf;
	
	
	struct node{
		int mi;
		int ma;
		int su;
	};
	
	struct sayo{
		int a;
		int b;
		
		
		bool operator==(sayo v){
			return a==v.a && b==v.b;
		}
	
	};
	
	sayo yuni={1,0};
	
	node node_merge(node x,node y){
		return {min(x.mi,y.mi),max(x.ma,y.ma),x.su+y.su};
	}
	
	
	vector<node> vec;
	vector<sayo> lazy;
	void shoki1(){
		vec.resize(2*cor+3, {0,0,0});
		lazy.resize(2*cor+3,yuni);
	}
	void shoki2(){
		for(int i=cor-1;i>0;i--) vec[i]=node_merge(vec[2*i],vec[2*i+1]);
	}
	
	sayo merge_sayo(sayo x,sayo y){
		int t1=x.a*y.a;
		int t2=x.b*y.a+y.b;
		return {t1,t2};
	}
	
	node node_sayo(node x,sayo y,int l,int r){
		if(y.a==0){
			return {y.b,y.b,y.b*(r-l)};
		}
		else if(y.a>0){
			return {x.mi*y.a+y.b,x.ma*y.a+y.b,x.su*y.a+(r-l)*y.b};
		}
		else{
			return {x.ma*y.a+y.b,x.mi*y.a+y.b,x.su*y.a+(r-l)*y.b};
		}
	}
		
	void chien(int k,int l,int r){
		if(lazy[k]==yuni) return;
		if(l+1<r){
			vec[k]=node_sayo(vec[k],lazy[k],l,r);
			lazy[2*k]=merge_sayo(lazy[2*k],lazy[k]);
			lazy[2*k+1]=merge_sayo(lazy[2*k+1],lazy[k]);
			lazy[k]=yuni;
		}
		else {
			vec[k]=node_sayo(vec[k],lazy[k],l,r);
			lazy[k]=yuni;
		}
	}
	
	node rangeshori(int a,int b,sayo w, int k=1,int l=0,int r=-3){
		//[a,b)を w.a倍してw.bをたす
		if(r<0) r=cor;
		
		if(a<=l && r<=b){
			lazy[k]=merge_sayo(lazy[k],w);
			chien(k,l,r);
			return vec[k];
		}
		if(r<=a || b<=l){
			chien(k,l,r);
			return vec[k];
		}
		
		chien(k,l,r);
//	cout<<k<<" "<<l<<" "<<r<<endl;
		node w1=rangeshori(a,b,w,k*2,l,(l+r)/2);
		node w2=rangeshori(a,b,w,k*2+1,(l+r)/2,r);
		vec[k]=node_merge(w1,w2);
		return vec[k];
	}
	
	////////////////////////
	////////////////////////
	//       区間 update ///
	////////////////////////	
	////////////////////////
	
	void range_upd(int l,int r,int v){
			rangeshori(l,r,(sayo){0,v});
	}
	
	
	
	////////////////////////
	////////////////////////
	//       区間 add    ///
	////////////////////////	
	////////////////////////
	
	
	void range_add(int l,int r,int v){
			rangeshori(l,r,(sayo){1,v});
	}
	// [a,b)
	// k-th node
	// k no kukanha [l,r)
	
	int getmin(int a,int b,int k=1,int l=0,int r=-1){
		//[a,b)のminを取得
		if(r<0) r=cor;
		chien(k,l,r);
		if(r<=a || b<=l){// 区間外
			return max_inf;
		}
		
		if(a<=l && r<=b){// 完全含む
			
			return vec[k].mi;
		}
		int w1=getmin(a,b,k*2,l,(l+r)/2);
		int w2=getmin(a,b,k*2+1,(l+r)/2,r);
		return min(w1,w2);
	}
	
	
	int getmax(int a,int b,int k=1,int l=0,int r=-1){
		//[a,b)のminを取得
		if(r<0) r=cor;
		chien(k,l,r);
		if(r<=a || b<=l){// 区間外
			return min_inf;
		}
		
		if(a<=l && r<=b){// 完全含む
			
			return vec[k].ma;
		}
		int w1=getmax(a,b,k*2,l,(l+r)/2);
		int w2=getmax(a,b,k*2+1,(l+r)/2,r);
		return max(w1,w2);
	}
	
	int getsum(int a,int b,int k=1,int l=0,int r=-1){
		if(r<0) r=cor;
		chien(k,l,r);
		if(r<=a || b<=l){// 区間外
			return 0;
		}
		
		if(a<=l && r<=b){// 完全含む
			
			return vec[k].su;
		}
		int w1=getsum(a,b,k*2,l,(l+r)/2);
		int w2=getsum(a,b,k*2+1,(l+r)/2,r);
		return (w1+w2);
	}
};

seg_zenbu ss;

signed main(){

	  cin.tie(0);
   			ios::sync_with_stdio(false);
	ss.shoki1();
	ss.shoki2();
	int n,q;
	cin>>n>>q;
	ss.range_upd(1,n+1,0);
	//ss.range_upd(0,n,(1ll<<31)-1);
	for(int i=0;i<q;i++){
		int t;
		cin>>t;
		if(t){
			int y,x;
			cin>>x>>y;
			cout<<ss.getsum(x,y+1)<<endl;
		}
		else{
			int s,t,x;
			cin>>s>>t>>x;
			t++;
			ss.range_add(s,t,x);
		}
	}
	return 0;
}


Measured memory_bytes: 13052