import java.util.Scanner; class prut{ String name; double price; int count; } public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); int n=sc.nextInt(); prut p; double sum=0; for (int i = 0; i < n; i++) { p=new prut(); p.name=sc.next(); p.price=sc.nextDouble(); p.count=sc.nextInt(); sum+=p.price*p.count; } System.out.printf("%.6f\n",sum); } }
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