int main(){ while(scanf("%s",str)!=EOF){ a.input(str); b=DtoB(a); b=reversion(b); a=BtoD(b); a.display(); } return 0; }
int main(){ int dec; scanf("%d",&dec); DtoB(dec); return 0; }
void DtoB(int d) { if(d/2) DtoB(d/2); printf("%d",d%2); }