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

#define LINE_SIZE 1024

int main() {
    char line[LINE_SIZE];
    char* endptr = NULL;
    char* r = NULL;
    double x = 0, val = 0, result = 0;
    int first = 1;
    int count = 0;

    memset(line, 0, LINE_SIZE);
    r = fgets(line, LINE_SIZE, stdin);

    if (r == NULL) {
        printf("Nepodarilo sa nacitat hodnotu x.\n");
        return 1;
    }
    assert(r != NULL);
    x = strtod(line, &endptr);
    if (line == endptr) {
        printf("Nepodarilo sa nacitat hodnotu x.\n");
        return 1;
    }
    while (fgets(line, LINE_SIZE, stdin) != NULL) {
        if (strlen(line) <= 1 && (line[0] == '\n' || line[0] == '\r')) {
            break;
        }
        char *ptr = line;
        while (isspace((unsigned char)*ptr)) ptr++;
        if (*ptr == '\0') break;
        val = strtod(line, &endptr);
        if (line == endptr) {
            printf("Nepodarilo sa nacitat koeficient %d.\n", count);
            return 1;
        }
        if (first) {
            result = val;
            first = 0;
        } else {
            result = result * x + val;
        }
        count++;
    }
    printf("Vysledok je: %.2f\n", result);
    return 0;
}