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

int main () {
    char* input = (char*) calloc (100, sizeof(char));
    int x;
    char* ptr;
    int counter = 0;
    int numbers [100];
    numbers[0] = 0;
    for (int i = 0; fgets(input, 100, stdin) != NULL; i++){
        if (!strcmp("\n", input))
            break;

        if (i == 0){
            x = (int)strtol(input, &ptr, 10);
        }
        else {
            numbers [i] = (int)strtol(input, &ptr, 10);
        }
        counter = i;
    }
    double result = 0;
    for(int i = 1; i <= counter; i++)
        result += (int)pow (x, i-1) * numbers [counter - i + 1];

    printf ("Vysledok je: ");
    printf ("%.2f\n", result);
    free(input);
    return 0;
}