#include #define rep(i,n) for(int i=0;i<(int)(n);i++) #define chmin(x,y) x = min((x),(y)); #define chmax(x,y) x = max((x),(y)); using namespace std; using ll = long long ; using P = pair ; using pll = pair; const int INF = 1e9; const long long LINF = 1e17; //const int MOD = 1000000007; const int MOD = 998244353; const double PI = 3.14159265358979323846; template struct ModInt{ long long x=0; constexpr ModInt(long long x=0):x((x%mod+mod)%mod){} constexpr ModInt operator+(const ModInt& r)const{return ModInt(*this)+=r;} constexpr ModInt operator-(const ModInt& r)const{return ModInt(*this)-=r;} constexpr ModInt operator*(const ModInt& r)const{return ModInt(*this)*=r;} constexpr ModInt operator/(const ModInt& r)const{return ModInt(*this)/=r;} constexpr ModInt& operator+=(const ModInt& r){ if((x+=r.x)>=mod) x-=mod; return *this;} constexpr ModInt& operator-=(const ModInt& r){ if((x-=r.x)<0) x+=mod; return *this;} constexpr ModInt& operator*=(const ModInt& r){ if((x*=r.x)>=mod) x%=mod; return *this;} constexpr ModInt& operator/=(const ModInt& r){ return *this*=r.inv();} ModInt inv() const { long long s=x,sx=1,sy=0,t=mod,tx=0,ty=1; while(s%t!=0){ long long temp=s/t,u=s-t*temp,ux=sx-temp*tx,uy=sy-temp*ty; s=t;sx=tx;sy=ty; t=u;tx=ux;ty=uy; } return ModInt(tx); } ModInt pow(long long n) const { ModInt a=1; ModInt b=*this; while(n>0){ if(n&1) a*=b; b*=b; n>>=1; } return a; } friend constexpr ostream& operator<<(ostream& os,const ModInt& a) {return os << a.x;} friend constexpr istream& operator>>(istream& is,ModInt& a) {return is >> a.x;} }; using mint = ModInt; //1-indexedに注意!!! struct BIT{ private: int n,n_; vector bit; public: BIT(int n):n(n){ bit.resize(n+1); n_ = 1; while(n_<=n) n_<<=1; n_ >>= 1; } //1-index long long sum(int i){ long long res = 0; while(i > 0){ res += bit[i]; i -= i&-i; } return res; } //1-index void add(int i,long long val){ while(i <= n){ bit[i] += val; i += i&-i; } } //return 1-index int lowerbound(long long w){ if(w <= 0) return 0; int x = 0; for(int k=n_;k>0;k>>=1){ if(x+k<=n&&bit[x+k] vector compress(vector &a){ vector val = a; int n = (int)a.size(); sort(val.begin(),val.end()); val.erase(unique(val.begin(),val.end()),val.end()); for(int i=0;i> n; vector a(n); vector b(n),c(n); rep(i,n) cin >> a[i]; vector mp = compress(a); BIT bit(n); rep(i,n){ b[i] = i - bit.sum(a[i]+1); bit.add(a[i]+1,1); } BIT bb(n); rep(i,n){ c[n-i-1] = bb.sum(a[n-i-1]-1+1); bb.add(a[n-i-1]+1,1); } mint ans = 0; rep(i,n){ ans += mint(b[i]) * mint(c[i]) * mint(mp[a[i]]); } BIT bitsum(n); mint cum = 0; rep(i,n){ ans += mint(c[i]) * (cum - mint(bitsum.sum(a[i]+1))); bitsum.add(a[i]+1,mp[a[i]]); cum += mp[a[i]]; } BIT bbsum(n); rep(i,n){ ans += mint(b[n-1-i]) * mint(bbsum.sum(a[n-i-1]-1+1)); bbsum.add(a[n-i-1]+1,mp[a[n-i-1]]); } cout << ans << endl; return 0; }