Compilare: main.c: In function 'main': main.c:134:26: warning: unused variable 's_fin' [-Wunused-variable] long int s_init = 0, s_fin = 0; ^~~~~ main.c:136:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^~~~~~~~~~~~~~~~~~~~ main.c:138:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld", &a[i]); ^~~~~~~~~~~~~~~~~~~~~~~~