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

int main(){
    int val, ele;
    scanf("%d", &val);
    if(val == 0){
        printf("0");
        return 0;
    }

    ele = (int)(log(val) / log(7));
    int  a[ele];
    
    for(int i = 0; i <= ele; i++){
        a[i] = val % 7;
        val /= 7;
    }
    
    for(int i = ele; i >= 0; i--){
        printf("%d", a[i]);
    }
    
    return 0;
}