View Compilation Error

0_0_36701716_16923.cpp:18:1: error: 'Max_Flow' does not name a type
 Max_Flow<int> MF;
 ^
0_0_36701716_16923.cpp: In function 'int main()':
0_0_36701716_16923.cpp:27:3: error: 'MF' was not declared in this scope
   MF.Init(2*n+2,S,T+n);
   ^