View Compilation Error

0_0_37405498_16261.cpp: In instantiation of 'Cap mf_graph<Cap, C>::flow(int, int, Cap) [with Cap = int; int C = 1]':
0_0_37405498_16261.cpp:23:77:   required from 'Cap mf_graph<Cap, C>::flow(int, int) [with Cap = int; int C = 1]'
0_0_37405498_16261.cpp:93:44:   required from here
0_0_37405498_16261.cpp:67:32: error: invalid use of 'auto'
       Cap tmp = dfs(dfs, s, inf);
                                ^