View Compilation Error

0_0_23207509_2296.cpp: In function 'int max_flow(int, int)':
0_0_23207509_2296.cpp:95:34: error: 'INF' was not declared in this scope
         while ((_f=dinic_dfs(s,t,INF))>0)
                                  ^
0_0_23207509_2296.cpp: In function 'int main()':
0_0_23207509_2296.cpp:128:28: error: 'INF' was not declared in this scope
             add_edge(i+n,j,INF);
                            ^