View Compilation Error

0_0_37389376_5695.cpp: In member function 'bool MCMF::BellmanFord(int, int, int&, int&)':
0_0_37389376_5695.cpp:27:46: error: 'inf' was not declared in this scope
         for (int i = 0; i <= n; i ++) d[i] = inf;
                                              ^
0_0_37389376_5695.cpp:29:48: error: 'inf' was not declared in this scope
         d[s] = 0; inq[s] = 1; p[s] = 0; a[s] = inf;
                                                ^