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

double vratenie(double x, double b, double v, double c) {
    double result = 0;
    result = (b * (x * x)) + (v * x) + c;
    return result;
}

int main() {
    double x = 0, b = 0, v = 0, c = 0;
    double result = 0;
    char input[5];

    // Input for x
    fgets(input, sizeof(input), stdin);
    if (input[0] == '\0') {
        printf("Chyba: Neplatná hodnota x.\n");
        return 1;
    } else {
        x = atof(input);
        printf("Prijate cislo: %.2f\n", x);
        memset(input, '\0', sizeof(input));
    }

    // Input for b
    fgets(input, sizeof(input), stdin);
    if (input[0] == '\0') {
        printf("Chyba: Neplatná hodnota b.\n");
        return 1;
    } else {
        b = atof(input);
        printf("Prijate cislo: %.2f\n", b);
        memset(input, '\0', sizeof(input));
    }

    // Input for v
    fgets(input, sizeof(input), stdin);
    if (input[0] == '\0') {
        printf("Chyba: Neplatná hodnota v.\n");
        return 1;
    } else {
        v = atof(input);
        printf("Prijate cislo: %.2f\n", v);
        memset(input, '\0', sizeof(input));
    }

    // Input for c
    fgets(input, sizeof(input), stdin);
    if (input[0] == '\0') {
        printf("Chyba: Neplatná hodnota c.\n");
        return 1;
    } else {
        c = atof(input);
        printf("Prijate cislo: %.2f\n", c);
        memset(input, '\0', sizeof(input));
    }

    // Calculate the result
    result = vratenie(x, b, v, c);

    // Print the result
    printf("Vysledok je: %.2f\n", result);

    return 0;
}