Compilare: user.cpp: In function 'void read()': user.cpp:35: warning: array subscript has type 'char' user.cpp:36: warning: array subscript has type 'char' user.cpp: In function 'void solve()': user.cpp:92: warning: unused variable 'i' user.cpp:92: warning: unused variable 'j' /tmp/ccUFxRnJ.o: In function `solve()': user.cpp:(.text+0x31b): warning: the `gets' function is dangerous and should not be used.