Compilare: user.cpp: In function 'void cit()': user.cpp:43: warning: array subscript has type 'char' user.cpp:44: warning: array subscript has type 'char' user.cpp:19: warning: unused variable 'j' user.cpp: In function 'int update(int, int)': user.cpp:55: warning: no return statement in function returning non-void user.cpp: In function 'void solve()': user.cpp:67: warning: unused variable 'j' user.cpp: In function 'int main()': user.cpp:80: warning: unused variable 'i' user.cpp:80: warning: unused variable 'j' user.cpp: In function 'int update(int, int)': user.cpp:55: warning: control reaches end of non-void function