View Compilation Error

0_0_39583201_3925.cpp: In member function 'std::pair<int, long long int> MCFGraph::flow(int, int)':
0_0_39583201_3925.cpp:7:13: error: expected primary-expression before 'long'
    7 | #define i64 long long
      |             ^~~~
0_0_39583201_3925.cpp:64:21: note: in expansion of macro 'i64'
   64 |             cost += i64(aug) * h[t];
      |                     ^~~