#ifndef ONLINE_JUDGE
#include "header.hpp"
#else
#include <bits/stdc++.h>
#include <atcoder/all>
#include <boost/multiprecision/cpp_int.hpp>
using cpp_int=boost::multiprecision::cpp_int;
#include <boost/multiprecision/cpp_dec_float.hpp>
template<unsigned size>using cpp_float=boost::multiprecision::number<boost::multiprecision::cpp_dec_float<size>>;
template<unsigned size>using cpp_double=boost::multiprecision::number<boost::multiprecision::cpp_dec_float<size,long long>>;
#endif

using namespace std;
using ll=long long;
inline void yn(bool x){if(x){cout<<"Yes"<<endl;}else{cout<<"No"<<endl;}}
#define double_out(x) fixed << setprecision(x)
template<class T> inline void erase_duplicate(vector<T>& A){sort(A.begin(),A.end());A.erase(unique(A.begin(),A.end()),A.end());}
inline ll powll(ll x,ll n){ll r=1;while(n>0){if(n&1){r*=x;};x*=x;n>>=1;};return r;}

using namespace std;
using ll=long long;

struct CLX{
    ll C,L,X;
    bool operator<(CLX clx)const{
        return L<clx.L;        
    }
};

struct CX{
    ll C, X;
    bool operator<(CX cx)const{
        return X<cx.X;
    }
};

int main(){
    ll N,Y,Z;
    cin>>N>>Y>>Z;
    vector<CLX> clx(N);
    for(ll i=0;i<N;i++){
        cin>>clx[i].C>>clx[i].L>>clx[i].X;
    }
    sort(clx.begin(),clx.end());

    ll ans=0;
    priority_queue<CX> pq;
    ll idx=0;
    while(idx<N && clx[idx].L<=Y){
        pq.push({clx[idx].C,clx[idx].X});
        idx++;
    }
    while(!pq.empty() && Y<Z){
        while(idx<N && clx[idx].L<=Y){
            pq.push({clx[idx].C,clx[idx].X});
            idx++;
        }
        auto [c,x]=pq.top();
        pq.pop();
        // cerr<<c<<" "<<x<<" "<<Y<<endl;
        ll ZZ=Z;
        if(idx<N){
            ZZ=min(ZZ, clx[idx].L);
        }
        ll cnt=(ZZ-Y+x-1)/x;
        if(cnt>c){
            Y+=x*c;
            ans+=c;
        }else{
            Y+=x*cnt;
            ans+=cnt;
            c-=cnt;
            if(c>0){
                pq.push({c,x});
            }
        }
    }
    // cerr<<"Y: "<<Y<<endl;
    if(Y<Z){
        cout<<-1<<endl;
    }else{
        cout<<ans<<endl;
    }
}