#include <bits/stdc++.h>
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
using namespace std;
const int man = (int)(2e5 + 500);
int n;
long long a[man], b[man];
int main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#ifdef _LOCAL
in("inC.txt");
out("outC.txt");
#endif
cin >> n;
for (int i = 0; i < n; ++i) {
cin >> a[i] >> b[i];
}
long long ans = 0;
for (int i = 0; i < n; ++i) {
long long mna = a[i], mnb = b[i];
for (int j = i; j < n; ++j) {
mna = min(mna, a[j]);
mnb = min(mnb, b[j]);
ans = max(ans, (j - i + 1) * 1ll * mna * mnb);
}
}
cout << ans << "\n";
return 0;
}
