Compilare: user.c: In function ‘main’: user.c:107:10: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] char c, prev = 'a' - TAJK; ^ user.c:113:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d\n", &V, &N, &M); ^ user.c:168:16: warning: ‘answer’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(f, "%d %d\n%c\n", L, C, answer + prev); ^