Compilare: user.cpp: In function ‘sol dfs(int)’: user.cpp:39:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < N[nod].size (); i++) { ^ user.cpp:40:14: warning: unused variable ‘x’ [-Wunused-variable] char x = N[nod][i]; ^ user.cpp: In function ‘void drum(int, int)’: user.cpp:56:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < N[nod].size (); i++) { ^ user.cpp:58:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (v[vecin] == 0) { ^ user.cpp:59:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (sc + d[vecin].nr < k) ^ user.cpp:60:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] sc += d[vecin].nr; ^ user.cpp: In function ‘int main()’: user.cpp:77:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] t[code (x[2])]++; ^ user.cpp:78:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] N[code (x[0])].push_back (code (x[2])); ^ user.cpp:86:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < fr.size (); i++) { ^ user.cpp:87:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (t[fr[i]] == 0) ^