Compilare: user.cpp: In function `int capacitate(int, int)': user.cpp:37: warning: comparison between signed and unsigned integer expressions user.cpp:40: warning: control reaches end of non-void function user.cpp: In function `int fluxul(int, int)': user.cpp:45: warning: comparison between signed and unsigned integer expressions user.cpp:48: warning: control reaches end of non-void function user.cpp: In function `int bfs()': user.cpp:66: warning: comparison between signed and unsigned integer expressions user.cpp: In function `void modif(int, int, int)': user.cpp:82: warning: comparison between signed and unsigned integer expressions