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

#define MAX_LINE_LENGTH 256

bool IsValidNumber(const char *line) {
    char *endFtr;
    strtod(line, &endFtr);
    return endFtr != line;
}

int main() {
    char line[MAX_LINE_LENGTH];
    double result = 0;
    double x;
    int lineNumber = 1;

    if (fgets(line, MAX_LINE_LENGTH, stdin) == NULL || !IsValidNumber(line)) {
        printf("Nepodarilo sa nacitat zaklad x\n");
        return 0;
    }

    x = strtod(line, NULL);

    while (fgets(line, MAX_LINE_LENGTH, stdin) != NULL && IsValidNumber(line)) {
        double coefficient = strtod(line, NULL);
        result = result * x + coefficient;
        lineNumber++;
    }

    if (line[0] != '\n') {
        printf("Nepodarilo sa nacitat polynom na %d mieste.\n", lineNumber);
        return 0;
    }

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