#include<stdio.h>
struct shop{
    char prdname[20];
    int id;
    float amount;
};
int main()
{
    int n,total;
    scanf("%d",&n);
    if(n<0)
    {
        printf("Invalid input");
        return 0;
    }
    struct shop s1[3];
    for(int i=0;i<n;i++)
    {
        scanf("%s%d%.2f",s1[i].prdname,&s1[i].id,&s1[i].amount);
    
     total=s1[0].amount;
    }
    
    printf("%.2f",total);
    
}