Compilare: user.c: In function ‘main’: user.c:19:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(p >= 0 && next[i][p][ch] == 0){ ^ user.c:20:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] next[i][p][ch] = poz; ^ user.c:37:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] stiv[j][dr] = next[j][stiv[j][dr - 1]][ch]; ^ user.c:11:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d ", &n, &m); ^