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

char* solution(int num) {
    if (num == 0) {
        char* result = malloc(2);
        strcpy(result, "0");
        return result;
    }
    
    char temp[32];
    int index = 0;
    int negative = num < 0;
    num = abs(num);
    
    while (num > 0) {
        temp[index++] = '0' + (num % 7);
        num /= 7;
    }
    
    char* result = malloc(index + 2);
    int pos = 0;
    
    if (negative) {
        result[pos++] = '-';
    }
    
    for (int i = index - 1; i >= 0; i--) {
        result[pos++] = temp[i];
    }
    result[pos] = '\0';
    
    return result;
}

int main() {
    int num;
    scanf("%d", &num);
    
    char* result = solution(num);
    printf("%s\n", result);
    free(result);
    
    return 0;
}