#include
void itob(int n,char s[])
{int i,j;
char t;
for(i=0;n;)
{s[i++]=n%2+'0';
n/=2;
}
s[i--]='\0';
for(j=0;j
{t=s[i];s[i]=s[j];s[j]=t;}
int main()
{char a[20];
int n;
scanf("%d",&n);
itob(n,a);
printf("%s\n",a);
return 0;