Compilare: user.cpp: In function 'void cit()': user.cpp:17: warning: unused variable 'j' user.cpp: In function 'int update(int, int)': user.cpp:53: warning: no return statement in function returning non-void user.cpp: In function 'void solve()': user.cpp:65: warning: unused variable 'j' user.cpp: In function 'int main()': user.cpp:78: warning: unused variable 'i' user.cpp:78: warning: unused variable 'j' user.cpp: In function 'int update(int, int)': user.cpp:53: warning: control reaches end of non-void function