Compilare: main.c: In function 'main': main.c:5:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("vila2.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("vila2.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:8:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ",&n,&k); ^~~~~~~~~~~~~~~~~~~~~ main.c:10:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&v[i]); ^~~~~~~~~~~~~~~~~~ main.c:24:18: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized] if(i>1&&c>dif) ~^~~~