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

int flagOfWrongInput = 0;
int counterOfDots = 0, positionOfDot = -1;
int lengthOfNumber = 0;

void getNumber(char str[], int b1);
void calculateInOtherSystemWhole(long int part, int power);
void calculateInOtherSystemFraction(double fraction, int power);

void getNumber(char str[], int b1) {
    for (int i = 0; i < 13; i++) {
        str[i] = 0;
    }
    char currentChar = 0;
    int currentPosition = 0;
    scanf("%c", &currentChar);
    while (scanf("%c", &currentChar) && currentChar != '\n') {
        if (currentChar == '.') {
            if (counterOfDots == 1) {
                flagOfWrongInput++;
                return;
            } else {
                counterOfDots++;
                positionOfDot = currentPosition;
            }
        } else if (!isdigit(currentChar) && !((toupper(currentChar) >= 'A') && (toupper(currentChar) <= 'F'))) {
            flagOfWrongInput++;
            return;
        } else {
            if (b1 <= 10) {
                if (currentChar - '0' < b1) {
                    str[currentPosition] = currentChar;
                } else {
                    flagOfWrongInput++;
                    return;
                }
            } else {
                if (toupper(currentChar) <= 'A' + b1 - 10) {
                    str[currentPosition] = (char) toupper(currentChar);
                } else {
                    flagOfWrongInput++;
                    return;
                }
            }
        }
        currentPosition++;
    }
    lengthOfNumber = currentPosition;
    if (positionOfDot == 0 || positionOfDot == currentPosition - 1) {
        flagOfWrongInput++;
    }
}
void calculateInOtherSystemWhole(long int part, int power) {
    long int currentValue = power;
    int degree = 1;
    while (currentValue < part) {
        currentValue *= power;
        degree++;
    }
    if (currentValue != part) {
        currentValue /= power;
        degree--;
        while (degree >= 0) {
            if (power <= 10) {
                printf("%li", part / currentValue);
            } else {
                if (part / currentValue < 10) {
                    printf("%li", part / currentValue);
                } else {
                    printf("%c", (char)('A' +  (part / currentValue) - 10));
                }
            }
            part = part - ((part / currentValue) * currentValue);
            currentValue /= power;
            degree--;
        }
    } else {
        printf("%d", 1);
        for (int i = 0; i < degree; i++) {
            printf("%d", 0);
        }
    }
}

void calculateInOtherSystemFraction(double fraction, int power) {
    double currentFraction = 1;
    int degree = 1;
    while (degree <= 12 && fraction != 0) {
        currentFraction = currentFraction / (double)power;
        if (fraction / currentFraction < 10) {
            printf("%d", (int)(fraction / currentFraction));
        } else {
            printf("%c", (char)('A' + (int)(fraction / currentFraction) - 10));
        }
        fraction = fraction - (double)((int)(fraction / currentFraction)) * currentFraction;
        degree++;
    }
}

int main() {
    int b1, b2;
    long int whole = 0;
    double fraction = 0;
    scanf("%d%d", &b1, &b2);
    if (b1 >= 2 && b1 <= 16 && b2 >= 2 && b2 <= 16) {
        char str[13];
        getNumber(str, b1);
        if (flagOfWrongInput == 0) {
            if (positionOfDot == -1) {
                for (int i = 0; i < lengthOfNumber; i++) {
                    if (isdigit(str[i])) {
                        whole = whole * b1 + str[i] - '0';
                    } else {
                        whole = whole * b1 + str[i] - 'A' + 10;
                    }
                }
                if (b2 != 10) {
                    calculateInOtherSystemWhole(whole, b2);
                } else {
                    printf("%d", whole);
                }
            } else {
                for (int i = 0; i < positionOfDot; i++) {
                    if (isdigit(str[i])) {
                        whole = whole * b1 + str[i] - '0';
                    } else {
                        whole = whole * b1 + str[i] - 'A' + 10;
                    }
                }
                int currentValue = b1;
                for (int i = positionOfDot + 1; i < 13 && str[i] != '\0'; i++) {
                    if (isdigit(str[i])) {
                        fraction += (double)(str[i] - '0') / currentValue;
                    } else {
                        fraction += (double)(str[i] - 'A' + 10) / currentValue;
                    }
                    currentValue *= b1;
                }
                if (b2 != 10) {
                    calculateInOtherSystemWhole(whole, b2);
                    if (fraction != 0) {
                        printf("%c", '.');
                        calculateInOtherSystemFraction(fraction, b2);
                    }
                } else {
                    printf("%f", whole + fraction);
                }
            }
        }
    } else {
        flagOfWrongInput++;
    }
    if (flagOfWrongInput > 0) {
        printf("Bad input\n");
    }
    return 0;
}