View Compilation Error

0_0_24534124_18144.cpp: In member function 'void node::insert(char*)':
0_0_24534124_18144.cpp:45:37: error: 'newnod' was not declared in this scope
     next[now][getch(buf[i])]=newnod();
                                     ^
0_0_24534124_18144.cpp: In member function 'int node::solve(char*)':
0_0_24534124_18144.cpp:87:14: error: 'INF' was not declared in this scope
     dp[i][j]=INF;
              ^
0_0_24534124_18144.cpp:94:18: error: 'INF' was not declared in this scope
     if (dp[i][j]<INF)
                  ^
0_0_24534124_18144.cpp:108:11: error: 'INF' was not declared in this scope
   int ans=INF;
           ^