Compilare: user.cpp: In function ‘void citeste()’: user.cpp:28: warning: array subscript has type ‘char’ user.cpp:29: warning: array subscript has type ‘char’ user.cpp:30: warning: array subscript has type ‘char’ user.cpp: In function ‘void dfs(int, int)’: user.cpp:49: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void drum(int, int, int)’: user.cpp:70: warning: comparison between signed and unsigned integer expressions