#line 1 "data_structure/test/LC_swag.test.cpp"
#define PROBLEM "https://judge.yosupo.jp/problem/queue_operate_all_composite"
#line 2 "math/mod_int.hpp"
#include<cstdint>
#include<iostream>
#include<vector>
/**
* @brief ModInt
*/
template<int MOD>
struct mod_int {
using mint=mod_int<MOD>;
using u64 = std::uint_fast64_t;
u64 a;
constexpr mod_int(const long long x = 0)noexcept:a(x>=0?x%get_mod():get_mod()-(-x)%get_mod()){}
constexpr u64 &value()noexcept{return a;}
constexpr const u64 &value() const noexcept {return a;}
constexpr mint operator+(const mint rhs)const noexcept{return mint(*this) += rhs;}
constexpr mint operator-(const mint rhs)const noexcept{return mint(*this)-=rhs;}
constexpr mint operator*(const mint rhs) const noexcept {return mint(*this) *= rhs;}
constexpr mint operator/(const mint rhs) const noexcept {return mint(*this) /= rhs;}
constexpr mint &operator+=(const mint rhs) noexcept {
a += rhs.a;
if (a >= get_mod())a -= get_mod();
return *this;
}
constexpr mint &operator-=(const mint rhs) noexcept {
if (a<rhs.a)a += get_mod();
a -= rhs.a;
return *this;
}
constexpr mint &operator*=(const mint rhs) noexcept {
a = a * rhs.a % get_mod();
return *this;
}
constexpr mint operator++(int) noexcept {
a += 1;
if (a >= get_mod())a -= get_mod();
return *this;
}
constexpr mint operator--(int) noexcept {
if (a<1)a += get_mod();
a -= 1;
return *this;
}
constexpr mint &operator/=(mint rhs) noexcept {
u64 exp=get_mod()-2;
while (exp) {
if (exp % 2) {
*this *= rhs;
}
rhs *= rhs;
exp /= 2;
}
return *this;
}
constexpr bool operator==(mint x) noexcept {
return a==x.a;
}
constexpr bool operator!=(mint x) noexcept {
return a!=x.a;
}
constexpr bool operator<(mint x) noexcept {
return a<x.a;
}
constexpr bool operator>(mint x) noexcept {
return a>x.a;
}
constexpr bool operator<=(mint x) noexcept {
return a<=x.a;
}
constexpr bool operator>=(mint x) noexcept {
return a>=x.a;
}
constexpr static int root(){
mint root = 2;
while(root.pow((get_mod()-1)>>1).a==1)root++;
return root.a;
}
constexpr mint pow(long long n)const{
long long x=a;
mint ret = 1;
while(n>0) {
if(n&1)(ret*=x);
(x*=x)%=get_mod();
n>>=1;
}
return ret;
}
constexpr mint inv(){
return pow(get_mod()-2);
}
static std::vector<mint> fac;
static std::vector<mint> ifac;
static bool init;
constexpr static int mx=10000001;
void build()const{
init=0;
fac.resize(mx);
ifac.resize(mx);
fac[0]=1,ifac[0]=1;
for(int i=1;i<mx;i++)fac[i]=fac[i-1]*i;
ifac[mx-1]=fac[mx-1].inv();
for(int i=mx-2;i>=0;i--)ifac[i]=ifac[i+1]*(i+1);
}
mint comb(long long b){
if(init)build();
if(a<0||b<0)return 0;
if(a==0&&b==0)return 1;
if((long long)a<b)return 0;
return fac[a]*ifac[a-b]*ifac[b];
}
mint fact()const{
if(init)build();
return fac[a];
}
mint fact_inv()const{
if(init)build();
return ifac[a];
}
friend std::ostream& operator<<(std::ostream& lhs, const mint& rhs) noexcept {
lhs << rhs.a;
return lhs;
}
friend std::istream& operator>>(std::istream& lhs,mint& rhs) noexcept {
lhs >> rhs.a;
return lhs;
}
constexpr static bool is_static=true;
constexpr static u64 get_mod(){
return MOD;
}
};
template<int MOD>std::vector<mod_int<MOD>> mod_int<MOD>::fac;
template<int MOD>std::vector<mod_int<MOD>> mod_int<MOD>::ifac;
template<int MOD>bool mod_int<MOD>::init=1;
#line 3 "math/mod_int998244353.hpp"
using mint=mod_int<998'244'353>;
/**
* @brief ModInt(998'244'353)
*/
#line 2 "data_structure/swag.hpp"
#include<stack>
#include<tuple>
#include<cmath>
#line 2 "alga/maybe.hpp"
#include<cassert>
/**
* @brief Maybe
* @see https://ja.wikipedia.org/wiki/%E3%83%A2%E3%83%8A%E3%83%89_(%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0)#Maybe%E3%83%A2%E3%83%8A%E3%83%89
*/
template<typename T>
struct maybe{
bool _is_none;
T val;
maybe():_is_none(true){}
maybe(T val):_is_none(false),val(val){}
T unwrap()const{
assert(!_is_none);
return val;
}
T unwrap_or(T e)const{
return _is_none?e:val;
}
bool is_none()const{return _is_none;}
bool is_some()const{return !_is_none;}
};
template<typename T,typename F>
auto expand(F op){
return [&op](const maybe<T>& s,const maybe<T>& t){
if(s.is_none())return t;
if(t.is_none())return s;
return maybe<T>(op(s.unwrap(),t.unwrap()));
};
}
#line 6 "data_structure/swag.hpp"
/**
* @brief SWAG(Queue)
*/
template<typename T,typename F>
class swag{
std::stack<std::pair<T,T>>front,back;
F f;
public:
swag(F f=F()):f(f){}
inline int size(){
return front.size()+back.size();
}
inline int empty(){
return front.empty()&&back.empty();
}
void push(T val){
if(back.empty()){
back.emplace(val,val);
}else{
back.emplace(val,f(back.top().second,val));
}
}
void pop(){
if(front.empty()){
while(!back.empty()){
const T val=back.top().first;
back.pop();
if(front.empty())front.emplace(val,val);
else front.emplace(val,f(val,front.top().second));
}
}
front.pop();
}
maybe<T> fold(){
if(front.empty()&&back.empty())return maybe<T>();
else if(front.empty()||back.empty())return front.empty()?back.top().second:front.top().second;
return f(front.top().second,back.top().second);
}
};
#line 3 "functional/composite.hpp"
/**
* @brief 一次関数の合成
*/
template<typename T>
struct composite{
//t(s(x))
std::pair<T,T> operator()(const std::pair<T,T>& s,const std::pair<T,T>& t){
return std::make_pair(s.first*t.first,s.second*t.first+t.second);
}
};
#line 2 "util/template.hpp"
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2")
#include<bits/stdc++.h>
using namespace std;
struct __INIT__{__INIT__(){cin.tie(0);ios::sync_with_stdio(false);cout<<fixed<<setprecision(15);}}__INIT__;
typedef long long lint;
#define INF (1LL<<60)
#define IINF (1<<30)
#define EPS (1e-10)
#define endl ('\n')
typedef vector<lint> vec;
typedef vector<vector<lint>> mat;
typedef vector<vector<vector<lint>>> mat3;
typedef vector<string> svec;
typedef vector<vector<string>> smat;
template<typename T>using V=vector<T>;
template<typename T>using VV=V<V<T>>;
template<typename T>inline void output(T t){bool f=0;for(auto i:t){cout<<(f?" ":"")<<i;f=1;}cout<<endl;}
template<typename T>inline void output2(T t){for(auto i:t)output(i);}
template<typename T>inline void debug(T t){bool f=0;for(auto i:t){cerr<<(f?" ":"")<<i;f=1;}cerr<<endl;}
template<typename T>inline void debug2(T t){for(auto i:t)output(i);}
#define loop(n) for(long long _=0;_<(long long)(n);++_)
#define _overload4(_1,_2,_3,_4,name,...) name
#define __rep(i,a) repi(i,0,a,1)
#define _rep(i,a,b) repi(i,a,b,1)
#define repi(i,a,b,c) for(long long i=(long long)(a);i<(long long)(b);i+=c)
#define rep(...) _overload4(__VA_ARGS__,repi,_rep,__rep)(__VA_ARGS__)
#define _overload3_rev(_1,_2,_3,name,...) name
#define _rep_rev(i,a) repi_rev(i,0,a)
#define repi_rev(i,a,b) for(long long i=(long long)(b)-1;i>=(long long)(a);--i)
#define rrep(...) _overload3_rev(__VA_ARGS__,repi_rev,_rep_rev)(__VA_ARGS__)
// #define rep(i,...) for(auto i:range(__VA_ARGS__))
// #define rrep(i,...) for(auto i:reversed(range(__VA_ARGS__)))
// #define repi(i,a,b) for(lint i=lint(a);i<(lint)(b);++i)
// #define rrepi(i,a,b) for(lint i=lint(b)-1;i>=lint(a);--i)
// #define irep(i) for(lint i=0;;++i)
// inline vector<long long> range(long long n){if(n<=0)return vector<long long>();vector<long long>v(n);iota(v.begin(),v.end(),0LL);return v;}
// inline vector<long long> range(long long a,long long b){if(b<=a)return vector<long long>();vector<long long>v(b-a);iota(v.begin(),v.end(),a);return v;}
// inline vector<long long> range(long long a,long long b,long long c){if((b-a+c-1)/c<=0)return vector<long long>();vector<long long>v((b-a+c-1)/c);for(int i=0;i<(int)v.size();++i)v[i]=i?v[i-1]+c:a;return v;}
// template<typename T>inline T reversed(T v){reverse(v.begin(),v.end());return v;}
#define all(n) begin(n),end(n)
template<typename T,typename E>bool chmin(T& s,const E& t){bool res=s>t;s=min<T>(s,t);return res;}
template<typename T,typename E>bool chmax(T& s,const E& t){bool res=s<t;s=max<T>(s,t);return res;}
const vector<lint> dx={1,0,-1,0,1,1,-1,-1};
const vector<lint> dy={0,1,0,-1,1,-1,1,-1};
#define SUM(v) accumulate(all(v),0LL)
template<typename T,typename ...Args>auto make_vector(T x,int arg,Args ...args){if constexpr(sizeof...(args)==0)return vector<T>(arg,x);else return vector(arg,make_vector<T>(x,args...));}
#define extrep(v,...) for(auto v:__MAKE_MAT__({__VA_ARGS__}))
#define bit(n,a) ((n>>a)&1)
vector<vector<long long>> __MAKE_MAT__(vector<long long> v){if(v.empty())return vector<vector<long long>>(1,vector<long long>());long long n=v.back();v.pop_back();vector<vector<long long>> ret;vector<vector<long long>> tmp=__MAKE_MAT__(v);for(auto e:tmp)for(long long i=0;i<n;++i){ret.push_back(e);ret.back().push_back(i);}return ret;}
using graph=vector<vector<int>>;
template<typename T>using graph_w=vector<vector<pair<int,T>>>;
template<typename T,typename E>ostream& operator<<(ostream& out,pair<T,E>v){out<<"("<<v.first<<","<<v.second<<")";return out;}
constexpr inline long long powll(long long a,long long b){long long res=1;while(b--)res*=a;return res;}
#line 6 "data_structure/test/LC_swag.test.cpp"
int main(){
lint n;
cin>>n;
swag<pair<mint,mint>,composite<mint>>sw;
while(n--){
lint c;
cin>>c;
if(c==0){
lint s,t;
cin>>s>>t;
sw.push(make_pair(s,t));
}
if(c==1){
sw.pop();
}
if(c==2){
lint x;
cin>>x;
cout<<composite<mint>()(make_pair(0,x),sw.fold().unwrap_or(make_pair(1,0))).second<<endl;
}
}
}
data_structure/test/LC_swag.test.cpp