include
include
using namespace std;
int main() {
int t,n,x;
cin>>t;
while(t–)
{
int max=0;
cin>>n>>x;
map <int,int> mpp;
int a,b;
for(int i=0;i<n;i++)
{
cin>>a>>b;
mpp.emplace(a,b);
}
for(auto it:mpp)
{
if((it.first)<=x )
{
if(it.second>max){
max=it.second;}
}
}
cout<<max<<endl;
}
return 0;
}
Link for problem CodeChef: Practical coding for everyone