/*
# include <stdio.h>
int main()
{
int arr[33]={};
int n,i=1,j;
scanf("%d",&n);
for(;;)
{
arr[i]=n%2;
i++;
n=n/2;
if(n==0)
{
break;
}
}
for(j=i-1;j>=1;j--)
{
printf("%d",arr[j]);
}
}
*/
/*
# include <stdio.h>
int main()
{
int arr[100001]={};
int n,k,i,j,sum=0,max=-10000000;
scanf("%d %d",&n,&k);
for(i=1;i<=n;i++)
{
scanf("%d",&arr[i]);
}
for(i=1;i<=n-k+1;i++)
{
sum=0;
for(j=i;j<=i+k-1;j++)
{
sum+=arr[j];
}
if(max<sum) max=sum;
}
printf("%d",max);
}
*/