#include <bits/stdc++.h>
 #include<atcoder/all>
using namespace atcoder;
//    #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-8)
                                          
    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);
                                            	}
                                            		
                                            
                                            };
                                            
 
                      
                                string itos( int i ) {
                                ostringstream s ;
                                s << i ;
                                return s.str() ;
                                }
                                 
                                int Gcd(int v,int b){
                                	if(v==0) return b;
                                	if(b==0) return v;
                                	if(v>b) return Gcd(b,v);
                                	if(v==b) return b;
                                	if(b%v==0) return v;
                                	return Gcd(v,b%v);
                                }
                 
                            
                                int mod;
int extgcd(int a, int b, int &x, int &y) {
    if (b == 0) {
        x = 1;
        y = 0;
        return a;
    }
    int 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 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;
                }
 
                              
                int pr[400100];
                int inv[400010];
                

                
    			int comb(int nn,int rr){
    				if(rr<0 || rr>nn || nn<0) return 0;
    				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]=((ll)pr[i-1]*i)%mod;
                	}
                		inv[ert]=beki(pr[ert],mod-2,mod);
                	for(int i=ert-1;i>=0;i--){
                		inv[i]=(ll)inv[i+1]*(i+1)%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()) ;
  

struct segsum{
	//       1
	//   2        3
	// 4   5   6    7
	
	
	private:
	public:
	
	// 1<<15 = 32768
	// 1<<16 = 65536
	// 1<<17 = 131072
	// 1<<18 = 262144
	
	int cor=(1<<18);
	
	vector<int> vec;
	
	void shoki1(){
		vec.resize(2*cor+3, 0);
	}
	void shoki2(){
		for(int i=cor-1;i>0;i--) vec[i]=vec[2*i]+vec[2*i+1];
	}
	void clear(){    
	    for(int i=0;i<(int)vec.size();i++)vec[i]=0;
    }
	
	void updadd(int x,int w){
		//x 項目に w加算
		x+=cor;
		vec[x]+=w;
		vec[x]%=mod;
		x/=2;
		while(x){
			vec[x]=(vec[2*x]+vec[2*x+1])%mod;
			x/=2;
		}
	}
	
	void updchan(int x,int w){
		//x項目をwに変更
		x+=cor;
		vec[x]=w;
		while(x){
			x/=2;
			vec[x]=(vec[2*x]+vec[2*x+1])%mod;
		}		
	}
	
	// [a,b)
	int sum(int a,int b){
		int hi=0,mi=0;
		a+=cor,b+=cor;
		while(a<b){
			if(a&1){
				hi=hi+vec[a];
				a++;
			}
			if(b&1){
				b--;
				mi=vec[b]+mi;
			}
			a/=2,b/=2;
		}
		return (hi+mi)%mod;
	}
	
	
	
};



int Dinvbe[500020];
int Dbe[500020];
void solve(){
mod=998244353;
segsum ss;
	ss.shoki1();
	ss.shoki2();

segsum kosu;
	kosu.shoki1();
	kosu.shoki2();
		
	for(int i=1;i<=5;i++){
	//	cout<<i<<" "<<beki(i,mod-2,mod)<<endl;
	}
	
	int n,k;
	cin>>n>>k;
	vector<int> ve(n);
	for(int i=0;i<n;i++)cin>>ve[i];
	vector<pa> W;
	for(int i=0;i<n;i++){
		W.pb(mp(ve[i],i));
	}
	sort(W.begin(),W.end(),greater<pa>());
	
	int D=mod+1-beki(k,mod-2,mod);
	D%=mod;
	int Dinv = beki(D,mod-2,mod);
	Dinvbe[0]=1;
	Dbe[0]=1;
	for(int i=1;i<=500000;i++){
		Dinvbe[i]=Dinvbe[i-1]*Dinv%mod;
		Dbe[i]=Dbe[i-1]*D%mod;
		
	}
	
	int ans=0;
	for(auto v:W){
		int f=max(k,v.second+1);
		int z1=kosu.sum(v.second,f);
		z1*=(mod+1)/2;
		z1%=mod;
		int k2=kosu.sum(f,ss.cor);
		int z2=ss.sum(f,ss.cor);
		z2*=Dinvbe[f-1];
	//	cout<<v.second+k-1<<endl;
		z2%=mod;
		z2*=(mod+1)/2;
		z2%=mod;
		ans+=z1+z2;
	//	cout<<z1<<" "<<z2<<endl;
		ss.updadd(v.second,Dbe[v.second]);
		kosu.updadd(v.second,1);
	}
	
	
	for(int i=0;i<=n+10;i++){
		ss.updchan(i,0);
		kosu.updchan(i,0);
		
	}
	
	reverse(W.begin(),W.end());
	
		for(auto v:W){
			int f=max(k,v.second+1);
		int z1=kosu.sum(v.second,f);
		z1*=(mod+1)/2;
		z1%=mod;
		int k2=kosu.sum(f,ss.cor);
		int z2=ss.sum(f,ss.cor);
		z2*=Dinvbe[f-1];
		z2%=mod;
		z2*=(mod+1)/2;
		z2%=mod;
			z2=k2+mod-z2;
			z2%=mod;
		ans+=z1+z2;
		
		ss.updadd(v.second,Dbe[v.second]);
		kosu.updadd(v.second,1);
	}
	cout<<ans%mod<<endl;
}



signed main(){
	cin.tie(0);
	ios::sync_with_stdio(false);

int n=1;
//	cin>>n;
	for(int i=0;i<n;i++){
		solve();

	}
 }


Measured memory_bytes: 24044