Compilare: user.cpp: In function ‘int main()’: user.cpp:54:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] Gc[i][v[G[i][j]]].push_back(G[i][j]); ^ user.cpp:60:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(int j = 0, l2 = Gc[i][v[i]].size(); j < l2; j++) ^ user.cpp:62:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(i < Gc[i][v[i]][j]) ^ user.cpp:64:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] ans += expand(i, Gc[i][v[i]][j], Gc[i][v[i]][j], i) * 2; ^ user.cpp:64:48: warning: array subscript has type ‘char’ [-Wchar-subscripts] ans += expand(i, Gc[i][v[i]][j], Gc[i][v[i]][j], i) * 2; ^