Compilare: main.c: In function 'main': main.c:52:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d\n", &n, &m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:55:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d ", v + i); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:63:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d %d\n", &a, &b, &c); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~