Compilare: user.cpp: In function ‘int maxflow()’: user.cpp:43:10: warning: unused variable ‘ok’ [-Wunused-variable] bool ok = 1; ^ user.cpp: In function ‘int readedge()’: user.cpp:66:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int maxflow()’: user.cpp:54:12: warning: ‘flow’ may be used uninitialized in this function [-Wmaybe-uninitialized] return flow; ^