View Compilation Error

0_0_37943131_2678.cpp:127:11: error: declaration of 'class T'
 template <class T>
           ^
0_0_37943131_2678.cpp:126:11: error:  shadows template parm 'class T'
 template <class T>
           ^
0_0_37943131_2678.cpp:128:3: error: too many template-parameter-lists
 T __lcm(T a, T b) {
   ^
0_0_37943131_2678.cpp: In function 'int main()':
0_0_37943131_2678.cpp:205:35: error: '__lcm' was not declared in this scope
    m = __lcm(m, (int)arr[i].size());
                                   ^