func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n;     cin >> n;     long long a[n], b[n];     for (long long i = 0; i < n; i++) {       cin >> a[i] >> b[i];     }     long long sum = 0;     long long price = 99999;     for (long long i = 0; i < n; i++) {       price = min(price, b[i]);       sum += price * a[i];     }     cout << sum << endl;   }   