#include #if __has_include() #include #endif using namespace std; #define eb emplace_back #define LL(...) ll __VA_ARGS__;lin(__VA_ARGS__) #define FO(n) for(ll IJK=n;IJK-->0;) #define fo(i,...) for(auto[i,i##stop,i##step]=for_range(0,__VA_ARGS__);i(1,__VA_ARGS__);i>=i##stop;i+=i##step) #define fe(a,e,...) for(auto&&__VA_OPT__([)e __VA_OPT__(,__VA_ARGS__]):a) #define defpp templatevoid pp(const auto&...a){[[maybe_unused]]const char*c="";((o<(a...);} #define entry defpp void main();void main2();}int main(){my::io();my::main();}namespace my{ #define use_ml998244353 using ml=atcoder::modint998244353; namespace my{ auto&operator<<(ostream&o,const atcoder::modint998244353&x){return o<<(int)x.val();} void io(){cin.tie(nullptr)->sync_with_stdio(0);cout<constexpr auto for_range(T s,T b){T a=0;if(s)swap(a,b);return array{a-s,b,1-s*2};} templateconstexpr auto for_range(T s,T a,T b,T c=1){return array{a-s,b,(1-s*2)*c};} void lin(auto&...a){(cin>>...>>a);} auto ceil(auto x,auto y){if(y<0)x=-x,y=-y;return x<=0?x/y:(x-1)/y+1;} constexpr ui64 kth_root_floor(ui64 a,ll k){ if (k==1)return a; auto within=[&](ui32 x){ui64 t=1;FO(k)if(__builtin_mul_overflow(t,x,&t))return false;return t<=a;}; ui64 r=0; of(i,sizeof(ui32)*CHAR_BIT)if(within(r|(1u<struct pair{ A a;B b; pair()=default; pair(const std::pair&p):a(p.first),b(p.second){} auto operator<=>(const pair&)const=default; }; templateusing pack_back_t=tuple_element_t>; } namespace my{ templatestruct vec; templatestruct hvec_helper{using type=vec::type>;}; templatestruct hvec_helper<0,T>{using type=T;}; templateusing hvec=hvec_helper::type; templatestruct vec:vector{ using vector::vector; ll size()const{return vector::size();} auto&emplace_back(auto&&...a){vector::emplace_back(std::forward(a)...);return*this;} auto pop_back(){auto r=this->back();vector::pop_back();return r;} template>auto sort(F f={})const{vec v=*this;ranges::sort(v,f);return v;} }; templaterequires(sizeof...(A)>=2)vec(const A&...a)->vec>>; templateauto iota(ll l,ll r=0){if(l>r)swap(l,r);vecv(r-l);std::iota(v.begin(),v.end(),l);return v;} } namespace my{ auto prime_enumerate(ll n){ vecsieve(n/3+1,1); for(ll p=5,d=4,i=1,rn=sqrt_floor(n);p<=rn;p+=d=6-d,i++){ if(!sieve[i])continue; for(ll q=(p*p)/3,r=d*p/3+(d*p%3==2),s=p*2;qr{2,3}; for(ll p=5,d=4,i=1;p<=n;p+=d=6-d,i++)if(sieve[i])r.eb(p); while(r.size()&&r.back()>n)r.pop_back(); return r; } } namespace my { templateauto factorial_factorize(T L,T R){ if(L==0)return vec>{}; auto primes=prime_enumerate(sqrt_floor(R-1)); auto remain=iota(L,R); unordered_mapres; fe(primes,p){ fo(i,ceil(L,p)*p,R,p){ T q=0; while(remain[i-L]%p==0)remain[i-L]/=p,++q; res[p]+=q; } } fo(i,L,R)if(remain[i-L]>1)res[remain[i-L]]+=1; return vec>(res.begin(),res.end()).sort(); } } namespace my{entry void main(){ LL(N); auto nu=factorial_factorize(1,N+1); use_ml998244353 ml ans=0; fo(k,1,N+1){ ml t=1; fe(nu,p,e)t*=e/k+1; ans+=t-1; // kが昇順なので,e/kが一度0になったらそれ以降ずっと0で答えに寄与しないので削除する. while(nu.size()&&nu.back().b/k==0)nu.pop_back(); } pp(ans); }}