Compilare: main.c: In function 'main': main.c:12:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld%d", &n, &v[0] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:16:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &v[i] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:9:25: warning: 'poz1' may be used uninitialized in this function [-Wmaybe-uninitialized] long long n, i, max1, poz1, s, max3, max2, dif; ^~~~