#include<stdio.h>
#include<string.h>
#include<ctype.h>

struct Product {
    char name[50];
    int id;
    float price;
};

int main(){
    int n;
    float total = 0.0;
    struct Product P;
    
    scanf("%d", &n);
    
    if(n < 0) {
        printf("Invalid input");
        return 0;
    }
    
    for(int i = 0;i < n;i++) {
        scanf("%s %d %f",P.name, &P.id, &P.price);
        
        for(int j = 0;p.name[j] !='\0'; j++) {
            printf("Invalid input");
            return 0;
        }
    }
    
    total += p.price;
    
    printf("%.2f", total);
    return 0;
}