Compilare: user.c: In function ‘main’: user.c:10:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&n,&k,&m); ^ user.c:12:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&a[i],&b[i]); ^ user.c:32:10: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(n<m) ^