#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops")
using namespace std;
using std::cout;
using std::cin;
using std::endl;
using ll=long long;
using ld=long double;
const ll ILL=2167167167167167167;
const int INF=2100000000;
const int mod=998244353;
#define rep(i,a,b) for (int i=(int)(a);i<(int)(b);i++)
#define all(p) p.begin(),p.end()
template<class T> using _pq = priority_queue<T, vector<T>, greater<T>>;
template<class T> ll LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> ll UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> bool chmin(T &a,T b){if(a>b){a=b;return 1;}else return 0;}
template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;}
template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());}
template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});}
void yneos(bool a,bool upp=0){if(a) cout<<(upp?"YES\n":"Yes\n"); else cout<<(upp?"NO\n":"No\n");}
template<class T> void vec_out(vector<T> &p,int ty=0){
if(ty==2){cout<<'{';for(int i=0;i<(int)p.size();i++){if(i){cout<<",";}cout<<'"'<<p[i]<<'"';}cout<<"}\n";}
else{if(ty==1){cout<<p.size()<<"\n";}for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}}
template<class T> T vec_min(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmin(ans,x);return ans;}
template<class T> T vec_max(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmax(ans,x);return ans;}
template<class T> T vec_sum(vector<T> &a){T ans=T(0);for(auto &x:a) ans+=x;return ans;}
int pop_count(long long a){int res=0;while(a){res+=(a&1),a>>=1;}return res;}

struct mint{
    static constexpr int  m = 998244353;
    int x=0;
    mint() : x(0){}
    mint(long long x_):x(x_ % m){if (x < 0) x += m;}
    int val(){return x;}
    mint &operator+=(mint b){if ((x += b.x) >= m) x -= m; return *this;}
    mint &operator-=(mint b){if ((x -= b.x) < 0) x += m; return *this;}
    mint &operator*=(mint b){x= (long long)(x) * b.x % m; return *this;}
    mint pow(long long e) const {
        mint r = 1,b =*this;
        while (e){
            if (e & 1) r *= b;
            b *= b;
            e >>= 1;
        }
        return r;
    }
    mint inv(){return pow(m - 2);}
    mint &operator/=(mint b){return *this *= b.pow(m - 2);}
    friend mint operator+(mint a, mint b){return a += b;}
    friend mint operator-(mint a, mint b){return a -= b;}
    friend mint operator/(mint a, mint b){return a /= b;}
    friend mint operator*(mint a, mint b){return a *= b;}
    friend bool operator==(mint a, mint b){return a.x == b.x;}
    friend bool operator!=(mint a, mint b){return a.x != b.x;}
};


void solve();
// oddloop
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int t=1;
    //cin>>t;
    rep(i,0,t) solve();
}

void solve(){
    int N;
    cin>>N;
    vector<ll> U(N),L(N);
    rep(i,0,N) cin>>U[i]>>L[i];
    using S=pair<mint,mint> ;
    using F=array<array<S,31>,31>;
    const int D=40;
    auto op=[&](S l,S r) -> S {
        l.first=(l.second*r.first+r.second*l.first);
        l.second=r.second*l.second;
        return l;
    };
    auto add=[&](S l,S r) -> S {
        l.first+=r.first;
        l.second+=r.second;
        return l;
    };
    vector<vector<F>> p(10,vector<F>(D));
    rep(i,0,10){
        rep(j,0,15) rep(k,0,10){
            p[i][0][j][(j*10+k)%15]={1,1};
        }
        rep(j,0,15) rep(k,0,i+1){
            p[i][0][j+15][(j*10+k)%15+(k==i?15:0)]={1,1};
        }
        rep(j,1,10){
            p[i][0][30][j]={1,1};
        }
        p[i][0][30][30]={0,1};
        rep(d,1,D){
            rep(j,0,31) rep(k,0,31) rep(l,0,31){
                p[i][d][j][l]=add(p[i][d][j][l],op(p[i][d-1][j][k],p[i][d-1][k][l]));
            }
        }
    }
    L[0]--;
    vector<S> ans(31);
    rep(i,1,U[0]){
        ans[i]={1,1};
    }
    ans[30]={0,1};
    ans[U[0]+15]={1,1};
    rep(i,0,N){
        rep(d,0,D) if(L[i]&(1ll<<d)){
            vector<S> n_ans(31);
            rep(j,0,31) rep(k,0,31){
                n_ans[k]=add(n_ans[k],op(ans[j],p[U[i]][d][j][k]));
            }
            swap(n_ans,ans);
        }
    }
    mint val=0;
    rep(i,0,15){
        ans[i]=add(ans[i],ans[i+15]);
        if(i%3!=0&&i%5!=0){
            val+=ans[i].first;
        }
        else{
            if(i%3==0) val+=ans[i].second*4;
            if(i%5==0) val+=ans[i].second*4;
        }
    }
    cout<<val.val()<<"\n";
}