#include<stdio.h>
struct product_det{
    char name[50] ;
    int id;
    float price;
    };
    int main(){[]
        int n;
        scanf("%d",&n);
        if(n<0){
            printf("Invalid input");
            return 0;   
            }
            struct product_det arr[n];
            float sum;
            for(int i=0;i<n;i++){
                scanf("%s %d %f",arr[i].name,arr[i].id,arr[i].price);
                float sum=0;
                float(int i=0;i<n;i++){
                    sum+=arr[i].price;
                }
            printf("2%f",sum);
}