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

#define POLE 100

int main() {
		
	double X = 0.00;
	char vstup[POLE];
	memset(vstup, 0,POLE);  //osetrenie
	char* a = fgets(vstup,POLE,stdin);
	
		
	if (vstup[0] == '\n'){  //ked pride na enter
	printf("koniec");
	exit(0);
	}


	for (int i = 0; i < strlen(vstup)-1; i++){
		//X = atof(riadok);
	if(vstup[i] == '.'){
		continue;
	}	
	if (isdigit(vstup[i]) == 0){
		printf ("neplati\n");
		exit(0);
		}	
	}
	X = atof(a);
	
	
	double polynom = 0.00;
	char Ppole [POLE];
	memset(Ppole, 0,POLE);
	double rovnica [POLE];
	int index = 0;
	int stupen = 0;
	double vysledok = 0.00;
	int idx = 0;
	
	while (1){
		char* b = fgets(Ppole,POLE,stdin);
		
		if (Ppole[0] == '\n'){  //ked pride na enter
		break;
	}
	for (int i = 0; i < strlen(Ppole)-1; i++){
		//X = atof(riadok);
	if(Ppole[i] == '.'){
		continue;
	}	
	if (isdigit(Ppole[i]) == 0){
		printf ("neplati\n");
		exit(0);
		}	
	}
	
	polynom = atof (b);
	rovnica[index] = polynom;
	index++;
	stupen++;

}

for (int i = stupen -1; i >= 0; i --){
		vysledok = vysledok + rovnica[idx] * pow(X, i);
		idx++;
	}
	
	
	vysledok = round (vysledok * 100)/100;
	printf ("Vysledok je: %.2f\n", vysledok);

	
	
	
    return 0;
}