View Compilation Error

0_0_16999495_22107.cpp: In function 'int main()':
0_0_16999495_22107.cpp:26:3: error: expected ',' or ';' before 'long'
   long long int res = 0;
   ^
0_0_16999495_22107.cpp:36:4: error: 'res' was not declared in this scope
    res += len - i + 1;
    ^
0_0_16999495_22107.cpp:40:20: error: 'res' was not declared in this scope
   printf("%I64d\n",res);
                    ^