#include <iostream>
using namespace std;
struct angajat
{
char nume[21];
int varsta;
int salariu;
int an_angajare;
};
angajat a[1001];
void CelMaiMareSalariu(int n, angajat b[])
{
int maxi = -1;
for (int i = 1; i <= n; ++i)
{
if (b[i].salariu > maxi)
{
maxi = b[i].salariu;
}
}
cout << maxi;
}
int main()
{
int n;
cin >> n;
for (int i = 1; i <= n; ++i)
{
cin >> a[i].nume >> a[i].varsta >> a[i].salariu >> a[i].an_angajare;
}
CelMaiMareSalariu(n, a);
return 0;
}