Compilare: user.cpp: In function ‘int main()’: user.cpp:20:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[i]].pb(fr[s[i]]); ^ user.cpp:20:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[i]].pb(fr[s[i]]); ^ user.cpp:21:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[s[i]].pb(i); ^ user.cpp:22:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] cp[s[i]]++; ^ user.cpp:29:7: warning: unused variable ‘adp’ [-Wunused-variable] int adp = 0, lt = 0; ^ user.cpp:14:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d ", &n, &k); ^ user.cpp:15:25: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, MAXL + 2, in); ^