#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define LENGTH 256

int main(){
    char line[LENGTH];
    char *y, *chcf;
    int cfIdx, cf1, y1,x1,chcf1 = 0;
    double x, cf,result = 0;
    fgets(line, 100, stdin);  
    y = strtok(line,"\n");   
    x = strtod(line, NULL);
    y1 = *y;
    if(y1 >= 'A' && line[0] != '\n'){
        printf("Nepodarilo sa nacitat zaklad x\n");
        return 1;
    }
    while(line[0] != '\n'){
        cfIdx++;
        result = result * x + cf;
        fgets(line, 100, stdin);
        chcf = strtok(line,"\n");
        cf = strtod(line,NULL);
        chcf1 = *chcf;
        if(chcf1 >='A' && line[0] != '\n'){
            printf("Nepodarilo sa nacitat polynom na %d mieste.\n", cfIdx);
            return 1;
        }
    }
    printf("Vysledok je: %.2f\n", result);
    return 0;
}