Compilare: user.cpp: In function ‘void d_Dfs(int)’: user.cpp:37:31: warning: variable ‘i2’ set but not used [-Wunused-but-set-variable] int fd1 = -1, fd2 = -1, i1, i2; ^ user.cpp: In function ‘void fu_Dfs(int)’: user.cpp:60:31: warning: variable ‘i2’ set but not used [-Wunused-but-set-variable] int fd1 = -1, fd2 = -1, i1, i2; ^ user.cpp: In function ‘void u_Dfs(int)’: user.cpp:87:63: warning: variable ‘i3’ set but not used [-Wunused-but-set-variable] int fd1 = -1, fd2 = -1, fd3 = -1, d1 = -1, d2 = -1, i1, i2, i3, j1, j2; ^ user.cpp:87:71: warning: variable ‘j2’ set but not used [-Wunused-but-set-variable] int fd1 = -1, fd2 = -1, fd3 = -1, d1 = -1, d2 = -1, i1, i2, i3, j1, j2; ^ user.cpp: In function ‘void fu_Dfs(int)’: user.cpp:77:35: warning: ‘i1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fu[v] = max(fu[v], fd2 + 1); ^ user.cpp: In function ‘void u_Dfs(int)’: user.cpp:116:28: warning: ‘j1’ may be used uninitialized in this function [-Wmaybe-uninitialized] u[v] = max(u[v], d2); ^