#import<bits/stdc++.h>
int n,j,k;char s[501],re[2];main(){std::cin>>n>>s;for(*re='0',n++;--n;)for(j=n;j--;)for(k=0;k<n-j&&s[j+k]==s[n-k-1];*re += (k++)==n-j-1);puts(re);}