Compilare: user.cpp: In function ‘void go(char)’: user.cpp:46:57: warning: array subscript has type ‘char’ [-Wchar-subscripts] else st[i][lvl] = first[i][st[i][lvl-1]+1][C]; ^ user.cpp:39:13: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘int main()’: user.cpp:60:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[5005]’ [-Wformat=] scanf("%s\n", &S[i]); ^