Compilare: user.c: In function ‘main’: user.c:13:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &t, &n, &k ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:20:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &x ); ^~~~~~~~~~~~~~~~~~~~~~~ user.c:40:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld", &v[i] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~