Compilare: user.c: In function ‘down’: user.c:67:25: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(2*i+1<=n && v[j].heap>v[2*i+1].heap || (v[j].heap==v[2*i+1].heap && v[j].rez>v[2*i+1].rez)) j=2*i+1; ^ user.c: In function ‘main’: user.c:81:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("proc2.in","r",stdin); ^ user.c:82:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("proc2.out","w",stdout); ^ user.c:83:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.c:90:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&st,&dr); ^