View Compilation Error

0_0_35851411_664.cpp: In function 'int good(long long int)':
0_0_35851411_664.cpp:7:10: error: request for member 'length' in 's', which is of non-class type 'long long int'
  int m=s.length();
          ^
0_0_35851411_664.cpp:10:11: error: invalid types 'long long int[int]' for array subscript
   sum+=s[i]-'0';
           ^