Compilare: user.cpp: In function ‘void citeste()’: user.cpp:35: warning: array subscript has type ‘char’ user.cpp:36: warning: array subscript has type ‘char’ user.cpp:37: warning: array subscript has type ‘char’ user.cpp: In function ‘void dfs(int, int)’: user.cpp:56: warning: comparison between signed and unsigned integer expressions user.cpp:65: warning: unused variable ‘t’ user.cpp:66: warning: unused variable ‘nn’ user.cpp: In function ‘void drum(int, int, int)’: user.cpp:86: warning: comparison between signed and unsigned integer expressions