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A - Alarm Clock.cpp
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A - Alarm Clock.cpp
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#include <bits/stdc++.h>
#define all(v) (v.begin(),v.end())
#define sz(v) ((int)((v).size()))
#define F first
#define S second
#define pb push_back
#define mp make_pair
#define endl '\n'
using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int, int > pii;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<ull> vul;
typedef vector <pii> vii;
typedef vector<vi> vvi;
void fast()
{
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
}
int isprime(int n)
{
for(int i=2;i*i<=n;i++)
{
if(n%i==0)
{
return i;
}
}
return n;
}
void solve()
{
ll a,b,c,d;
cin>>a>>b>>c>>d;
if(b>=a){
cout<<b<<endl;
return ;
}
if(b<a&&c<=d)
{
cout<<-1<<endl;
}
else
{
a-=b;
ll w=ceil(1.0*a/(c-d));
cout<<b+(w*c)<<endl;
}
}
int main()
{
fast();
int t;
cin>>t;
while(t--)
{
solve();
}
return 0;
}