View Compilation Error

0_0_13706926_23320.cpp: In function 'int main()':
0_0_13706926_23320.cpp:47:10: error: request for member 'size' in 's', which is of non-class type 'std::string [20020] {aka std::basic_string<char> [20020]}'
    ++a[s.size()%2];
          ^
0_0_13706926_23320.cpp:49:14: error: 'tot' was not declared in this scope
   sort(s+1,s+tot+1);
              ^