588A Duff and Meat codeforces solution in cpp

 

588A Duff and Meat codeforces solution in cpp

by ujjal roy

#include<bits/stdc++.h>

using namespace std;

main()

{

  int n,p,a,i,sum=0,r=1000;

  cin>>n;

  for(i=1;i<=n;i++)

  {

    cin>>a>>p;

    if(p<r) r=p;

     sum+=r*a;

  }

   cout<<sum<<endl;

return 0;

}