Compilare: user.c:4:34: warning: built-in function ‘conj’ declared as non-function [enabled by default] char s1[MAXN + 1], s2[MAXN + 1], conj[256]; ^ user.c: In function ‘main’: user.c:18:7: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(dr > 1 && s2[dr - 1] == conj[s1[i]]){ ^ user.c:12:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d ", &n); ^ user.c:13:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s1, MAXN, in); ^