#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
typedef struct{
    char name[100];
    double price;
}product;
int main(){
    int n;
    if(scanf("%d",&n)!=1 || n<=0){
        printf("Invalid input\n");
        return 1;
    }
    product*products=(product*)malloc(n* sizeof(product));
    if(products==NULL){
        printf("Memory error\n");
        return 1;
    }
    for(int i=0;i<n;i++){
        if(scanf("%99s %lf",products[i].name,&products[i].price)!=2 || products[i].price<=0){
            printf("Invalid input\n");
            free(products);
            return 1;
        }
    }
    for(int i=0;i<n;i++){
        printf("%s:$%.2f\n",products[i].name,&products[i].price);
    }
    free(products);
    return 0;
}