>>310
#include <stdio.h>

int main(void)
{
unsigned int n, i = 1 << sizeof(unsigned int) * 8 - 1;

scanf("%d", &n);
while((i&n)==0) i>>=1;
while(i) {
putchar(n & i ? '1' : '0');
i >>= 1;
}

return 0;
}