View Compilation Error

0_0_26019629_4613.cpp: In function 'int main()':
0_0_26019629_4613.cpp:62:14: error: 'u' was not declared in this scope
          Add(u, v);
              ^
0_0_26019629_4613.cpp:62:17: error: 'v' was not declared in this scope
          Add(u, v);
                 ^