#include "bits/stdc++.h" using namespace std; #define all(x) begin(x),end(x) template ostream& operator<<(ostream &os, const pair &p) { return os << '(' << p.first << ", " << p.second << ')'; } template::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; } #define debug(a) cerr << "(" << #a << ": " << a << ")\n"; typedef long long ll; typedef vector vi; typedef vector vvi; typedef pair pi; const int mxN = 1e5+1, oo = 1e9; const long long MD = 998244353; template struct mdint { int d=0; mdint () {d=0;} mdint (long long _d) : d(_d%MOD){ if(d<0) d+=MOD; }; friend mdint& operator+=(mdint& a, const mdint& o) { a.d+=o.d; if(a.d>=MOD) a.d-=MOD; return a; } friend mdint& operator-=(mdint& a, const mdint& o) { a.d-=o.d; if(a.d<0) a.d+=MOD; return a; } friend mdint& operator*=(mdint& a, const mdint& o) { return a = mdint((ll)a.d*o.d); } mdint operator*(const mdint& o) const { mdint res = *this; res*=o; return res; } mdint operator+(const mdint& o) const { mdint res = *this; res+=o; return res; } mdint operator-(const mdint& o) const { mdint res = *this; res-=o; return res; } mdint operator^(long long b) const { mdint tmp = 1; mdint power = *this; while(b) { if(b&1) { tmp = tmp*power; } power = power*power; b/=2; } return tmp; } friend mdint operator/=(mdint& a, const mdint& o) { a *= (o^(MOD-2)); return a; } mdint operator/(const mdint& o) { mdint res = *this; res/=o; return res; } bool operator==(const mdint& o) { return d==o.d;} bool operator!=(const mdint& o) { return d!=o.d;} friend istream& operator>>(istream& c, mdint& a) {return c >> a.d;} friend ostream& operator<<(ostream& c, const mdint& a) {return c << a.d;} }; using mint = mdint; typedef array ss; int k; ss add(ss& a, int v) { ss b = a; for(int j=0;j st; stack s; sta() { ss cur = {}; cur[0]=1; st.push(cur); } void add(int i) { s.push(i); st.push(::add(st.top(),i)); } int pop() { st.pop(); int tmp = s.top(); s.pop(); return tmp; } bool empty() {return s.empty();} ss& myss() {return st.top();} }; int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); int n,m; cin >> n >> m >> k; sta s1 = {},s2 = {}; auto remove = [&]() { if(s1.empty()) { while(!s2.empty()) { s1.add(s2.pop()); } } if(!s1.empty()) s1.pop(); }; vi a(n); for(int& i: a) cin >> i; for(int i=0;i