https://ac.nowcoder.com/acm/contest/view-submission?submissionId=40835591   小白月赛的F题给的标程   不是很理解这里    for(inti=1;i<=n;i++)       {           ans[a[i].id]=find(1,1,n,a[i].y,n)+1;           change(1,1,n,a[i].y,ans[a[i].id]);       }  我改成这样为什么不对    for(inti=1;i<=n;i++)       {           ans[i]=fin...