#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pll pair<ll, ll>
const ll DIM = 1e5 + 7;
const ll mod = 1e9 + 7;
const ll INF = 1e17;
ll a[DIM], b[DIM];
int main(){
ios::sync_with_stdio(false);cin.tie(nullptr); cout.tie(nullptr);
ll n;
cin >> n;
for (int i=1; i<=n; i++) {
cin >> a[i] >> b[i];
}
ll answer = 0;
for (int i=1; i<=n; i++) {
ll mina = INF, minb = INF;
for (int j=i; j>=1; j--) {
mina = min(mina, a[j]);
minb = min(minb, b[j]);
answer = max(answer, mina * minb * (i - j + 1));
}
}
cout << answer << endl;
}
;
