#include <stdio.h>

int main(){
    long long int N;
    int out[100], mod;
    long long int i = 0, j = 0;

    scanf("%lld", &N);

    do{
        mod = N%7;
        N /= 7;
        out[i++] = mod;
    }while(N >= 7);

    out[i++] = (int)N;
    for(j = 0;  j < i; j++){
        printf("%d", out[i - 1 - j]);
    }
    printf("\n");

    return 0;
}