Compilare: user.cpp: In function ‘void compute_suffix_arrays()’: user.cpp:44:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] count[text[i]] ++; ^ user.cpp: In function ‘void read_input()’: user.cpp:24:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(text, 1, MAX_N, stdin); length = strlen(text); ^