119

//119
#include <cstdio>

char bits[16];

int main(void) {
    FILE* fin = fopen("input.txt", "r");
    FILE* fout = fopen("output.txt", "w");

    int n, cnt = 0;
    fscanf(fin, "%d", &n);
    fclose(fin);
    if (n == 0) {
        fprintf(fout, "0\n");
        fclose(fout);
        return 0;
    }
    for (; n != 0; ++ cnt, n >>= 1) {
        if (n % 2 == 0)
            bits[14 - cnt] = 0x30;
        else
            bits[14 - cnt] = 0x31;
    }
    fprintf(fout, "%s\n", bits + 15 - cnt);
    fclose(fout);
    return 0;
}