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

// Function to check if string is a valid floating point number
int isValidNumber(char *str) {
    int dotCount = 0;
    int i = 0;

    if (str[0] == '-' || str[0] == '+') i++;

    for (; str[i] != '\0'; i++) {
        if (str[i] == '.') {
            dotCount++;
            if (dotCount > 1) return 0;
        } else if (!isdigit(str[i])) {
            return 0;
        }
    }
    return (i > 0); // must contain at least one digit
}

int main() {
    int n;
    if (scanf("%d", &n) != 1) {
        printf("Invalid input\n");
        return 0;
    }

    char transactions[1005][100];
    
    // Read n transaction amounts as strings
    for (int i = 0; i < n; i++) {
        if (scanf("%s", transactions[i]) != 1 || !isValidNumber(transactions[i])) {
            printf("Invalid input\n");
            return 0;
        }
    }

    // Read new transaction
    if (scanf("%s", transactions[n]) != 1 || !isValidNumber(transactions[n])) {
        printf("Invalid input\n");
        return 0;
    }

    // Print updated list
    for (int i = 0; i <= n; i++) {
        printf("%s", transactions[i]);
        if (i < n) printf(" ");
    }
    printf("\n");

    return 0;
}
    if (scanf("%d", &n) != 1) {
        printf("Invalid input\n");
        return 0;
    }

    double arr[1005];
    char buffer[100];

    // Read n floating numbers
    for (int i = 0; i < n; i++) {
        scanf("%s", buffer);
        if (!isValidNumber(buffer)) {
            printf("Invalid input\n");
            return 0;
        }
        arr[i] = atof(buffer);
    }

    // Read new transaction
    scanf("%s", buffer);
    if (!isValidNumber(buffer)) {
        printf("Invalid input\n");
        return 0;
    }
    arr[n] = atof(buffer);

    // Print updated list
    for (int i = 0; i <= n; i++) {
        printf("%.2f", arr[i]);
        if (i < n) printf(" ");
    }
    printf("\n");

    return 0;
}