Compilare: user.c: In function ‘main’: user.c:53:36: warning: variable ‘cs’ set but not used [-Wunused-but-set-variable] int rez = 0, n2 = n / 2, l1, l2, cs, st, dr, k, mid; ^ user.c:37:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d%d", &n, &m, &l, &c); ^ user.c:44:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld", &ma[i][j]); ^