#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define double long double
using namespace std;
void db() {cerr << endl;}
template <typename T, typename ...U> void db(T a, U ...b) {
cerr << a << ' ', db(b...);
}
const int N = 100, inf = 1e9 + 1;
int main(){
ios::sync_with_stdio(0), cin.tie(0);
int n;
cin >> n;
ll a[n], b[n];
for (int i = 0; i < n; i++)
cin >> a[i] >> b[i];
ll ans = 0;
for (int i = 0; i < n; i++){
ll mi, mi2;
mi = mi2 = inf;
for (int j = i; j < n; j++){
mi = min(mi, a[j]);
mi2 = min(mi2, b[j]);
ans = max(ans, mi * mi2 * (j - i + 1));
//db(i, j, mi * mi2 * (j - i + 1));
}
}
cout << ans;
}
