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

#define LINE_SIZE 100

int main() {
    char line[LINE_SIZE];
    double x, result;
    double coefficient;
    int first = 1;

    // Read the evaluation point
    if (fgets(line, LINE_SIZE, stdin) == NULL || sscanf(line, "%lf", &x) != 1) {
        printf("Chyba: Neplatná hodnota pre x.\n");
        return 1;
    }
    
    result = 0;
    
    // Read coefficients until EOF or an empty line
    while (fgets(line, LINE_SIZE, stdin) != NULL) {
        if (strlen(line) <= 1) break; // Empty line check
        
        if (sscanf(line, "%lf", &coefficient) != 1) {
            printf("Chyba: Neplatný koeficient.\n");
            return 1;
        }
        
        if (first) {
            result = coefficient;
            first = 0;
        } else {
            result = result * x + coefficient;
        }
    }
    
    if (first) {
        printf("Chyba: Neboli zadané žiadne koeficienty.\n");
        return 1;
    }
    
    // Print result rounded to two decimal places
    printf("Vysledok je: %.2f\n", result);
    
    return 0;
}