Compilare: user.cpp: In function `void init()': user.cpp:19: warning: array subscript has type `char' user.cpp:24: warning: array subscript has type `char' user.cpp:25: warning: array subscript has type `char' user.cpp: In function `void solve()': user.cpp:67: warning: unused variable `int t' user.cpp: In function `int main()': user.cpp:168: warning: char format, different type arg (arg 2)