Sicily 1001(dp)

#include <iostream>
#include <cstring>
#include <string>
using namespace std;

int f[10000] ;
int main()
{
       string s ;
       while(cin >> s && s[0] != ‘0‘)
       {
           s = ‘ ‘ + s ;
           memset(f,0,sizeof(f)) ;
           f[0] = 1 ; f[1] = 1 ;
           for(int i = 2 ; i < s.size() ;i ++)
           {
                  if(s[i] == ‘0‘)
                  {
                         f[i] = f[i-2] ;
                  }
                  else
                  {
                         f[i] = f[i-1];
                         if(10*(s[i-1] - ‘0‘)+s[i]-‘0‘ > 9 && 10*(s[i-1] - ‘0‘)+s[i]-‘0‘ <= 26)
                         {
                                f[i] = f[i] + f[i-2] ;
                         }
                  }
           }
           cout << f[s.size()-1] << endl;
       }

}