#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h>

int main(int argc, char* argv[]) {
    uint64_t result = 0;
    char * str = argv[1];
    if (argc > 1) {
        while (*str) {
            char *end;
            uint64_t b = 1;
            long val = strtoll(str, &end, 8);
            if (*str != *end) {
                str = end;
                val -= 1;
                result |= b << val;
            }
            if (*str || str == end) {
                str +=1;
            }
        }
    }
    printf("%" PRIx64 "\n", result);
}