任取一个作为根节点,做两次dfs 考虑使用贡献来更新答案 而第二次dfs考虑这条边权的影响 #include<bits/stdc++.h> using namespace std; typedef long long ll; const int N=2e5+10; const int mod=11092019; ll t[N]; int n,m; ll ans[N]; ll v[N],depth[N]; ll f1[N],f2[N]; int h[...
The database is available as a Microsoft Access relational database or an Excel spreadsheet. To minimise repetition in data entry, spawning observation information is entered in three primary tables (Fig.2). The first (“tblSitesForSpawningObservations”) is used to enter geographic information on ...