Compilare: user.cpp: In function ‘void back(int)’: user.cpp:74:13: warning: unused variable ‘conf’ [-Wunused-variable] int conf = c2, sum2 = c, x = (c ^ c2); ^ user.cpp:74:24: warning: unused variable ‘sum2’ [-Wunused-variable] int conf = c2, sum2 = c, x = (c ^ c2); ^ user.cpp: In function ‘void Solve()’: user.cpp:91:9: warning: unused variable ‘Min’ [-Wunused-variable] int Min = 0x3f3f3f3f, PMin = -1; ^ user.cpp:91:27: warning: unused variable ‘PMin’ [-Wunused-variable] int Min = 0x3f3f3f3f, PMin = -1; ^