q = unique(b +1, b +1+ n) - b -1;for(inti =1; i <= n ; ++i){ a[i] = lower_bound(b +1, b +1+ n, a[i]) - b; }for(inti =1; i <= n ; ++i) ++c[a[i]]; dfs(1,0);for(inti =1; i <= n ; ++i) sum[i] += sum[i -1];intans =0;for(inti =...
【图论】CF1467E - Distinctive Roots in a Tree 题目链接:https://codeforces.com/contest/1467/problem/E 观察 对于某种权值valval,若点ii的权值a[i]=vala[i]=val则把这个点染成黑色,其他的点染成白色。 定义黑色节点的数量,为权值valval的出现次数cnt[val]cnt[val]。
Just as the roots of a tree nourish and sustain the tree, the roots of character nourish and sustain the individual. They are the foundation upon which one stands, giving them the strength to grow and become the person they are meant to be. In conclusion, the roots of a tree, like the...
A treehasroots (根).Peoplehaverootstoo.Ifyougettotherootof a problem,youwillsolveit.It'sthesamethingwithwords.Digdeeplyinto a big,unknownwordandyouwillunderstandwhereitcamefrom.Asreaders,especiallythosereadingin a secondlanguage,weneedtodealwiththetextasifweweredetectives (侦探) whoarejustlookingfor...
A big, mighty(高大的) tree stood in a forest. Its branches(树枝) spread out and its roots (根) went deep in the earth. A lot of people came here to have a rest under it. And a lot of birds stood on its branches to sing and dance. The big tree was very proud all the time....
称这样的xx为distinctiverootdistinctiveroot, 统计所给的树中这样的distinctiverootdistinctiveroot的个数。 题解 如图,考虑树中的每一个节点xx, 对于它的某一个子树yy,我们可以看一下这个子树yy下面是否有和xx的权值 相同的节点zz,也即a[x]=a[z]a[x]=a[z]。如果存在,那么就添加一条特殊的有向边,从xx指向...
Roots: With Robert Reed, John Amos, Louis Gossett Jr., Lynda Day George. A dramatization of author Alex Haley's family line from ancestor Kunta Kinte's enslavement to his descendants' liberation.
A treehasroots.Peoplehaverootstoo,Ifyougettotherootof a problem,youwillsolveit.It'sthesamethingwithwords.Digdeeplyinto a big,unfamiliarwordandyouwillunderstandwhereitcamefromAsreaders,especiallythosereadingin a secondlanguage,weneedtodealwiththetextasifweweredetectives (侦探) lookingforinformationtounlock...
A tree has roots. People have roots too. If you get to the root of a problem, you will solve it. It's the same thing with words. Dig deeply into a big, unfamiliar word and you will understand where it came from. As readers, especially those reading in a second language, we ...