QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#528871#4839. Smaller LCANanani_fan#WA 2050ms539456kbC++203.5kb2024-08-23 23:41:102024-08-23 23:41:11

Judging History

你现在查看的是最新测评结果

  • [2024-08-23 23:41:11]
  • 评测
  • 测评结果:WA
  • 用时:2050ms
  • 内存:539456kb
  • [2024-08-23 23:41:10]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
//注意Sum和cnt的区别
const int maxn = 3e5+10; // 数据范围
ll ans[maxn];
int n, cnt;
int sum[maxn*150], ls[maxn*150], rs[maxn*150];
// 用法:update(root, 1, n, x, f); 其中 x 为待修改节点的编号
void update(int& p, int L, int R, int x, int f) {  // 引用传参
    if (!p) p = ++cnt;  // 当结点为空时,创建一个新的结点
    if (L == R) {
        sum[p] += f;
        return;
    }
    int m = L + ((R - L) >> 1);
    if (x <= m)
        update(ls[p], L, m, x, f);
    else
        update(rs[p], m + 1, R, x, f);
    sum[p] = sum[ls[p]] + sum[rs[p]];  // pushup
}
// 用法:query(root, 1, n, l, r);
int query(int p, int L, int R, int l, int r) {
    if (!p) return 0;  // 如果结点为空,返回 0
    if (L >= l && R <= r) return sum[p];
    int m = L + ((R - L) >> 1), ans = 0;
    if (l <= m) ans += query(ls[p], L, m, l, r);
    if (r > m) ans += query(rs[p], m + 1, R, l, r);
    return ans;
}
int merge(int a, int b, int l, int r) {
    if (!a) return b;
    if (!b) return a;
    if (l == r) {
        // do something...
        return a;
    }
    int mid = (l + r) >> 1;
    ls[a] = merge(ls[a], ls[b], l, mid);
    rs[a] = merge(rs[a], rs[b], mid + 1, r);
    sum[a]=sum[ls[a]]+sum[rs[a]];
    return a;
}
vector<int> ve[maxn];
int L[maxn],R[maxn],dfn;
int Sum[maxn];
void add(int l,int r,int x){
    // cout<<"l="<<l<<" r="<<r<<" x="<<x<<endl;
    Sum[l]+=x;
    Sum[r+1]-=x;
}
int dep[maxn],f[21][maxn];
void dfs1(int x,int h)
{
    L[x]=++dfn;
    dep[x]=dep[h]+1;
	for(int i=0;i<=19;i++)
		f[i+1][x]=f[i][f[i][x]];
    for(auto it:ve[x])if(it!=h){
		f[0][it]=x;
        dfs1(it,x);
    }
    R[x]=dfn;
}
int lca(int x,int y)
{
	if(dep[x]<dep[y]) swap(x,y);
	for(int i=20;i>=0;i--)
	{
		if(dep[f[i][x]]>=dep[y]) x=f[i][x];
		if(x==y) return x;
	}
	for(int i=20;i>=0;i--)
		if(f[i][x]!=f[i][y])
			x=f[i][x],y=f[i][y];
	return f[0][x];
}
int getson(int x,int y){
    assert(L[y]>=L[x]&&R[y]<=R[x]);
    for(int i=20;i>=0;i--)if(dep[f[i][y]]>dep[x])y=f[i][y];
    return y;
}
vector<int> ad[maxn];
vector<pair<int,int>>era[maxn];
int dfs(int x,int h){
    int rt=0;
    for(auto it:ve[x])if(it!=h){
        int g=dfs(it,x);
        int t=query(g,1,n,x,n);
        add(L[x],R[x],t);
        add(L[it],R[it],-t);
        rt=merge(rt,g,1,n);
        // cout<<"x="<<x<<" h="<<h<<" it="<<it<<" t="<<t<<endl;
    } 
    for(auto [p,q]:era[x])if(x<=p*q){
        add(1,n,1);
        if(p!=x&&q!=x)update(rt,1,n,p*q,-1);
        else update(rt,1,n,p*q,-1);;
        add(L[x],R[x],-2);
    }
    for(auto it:ad[x]){
        update(rt,1,n,it,1);
        add(L[x],R[x],1);
    }  
    return rt;
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin>>n;
    for(int i=1;i<n;i++){
        int x,y;cin>>x>>y;
        // int x=i+1,y=rand()%(i)+1;
        ve[x].push_back(y);
        ve[y].push_back(x);
    }
    ll all=0;
    dfs1(1,0);
    for(int i=1;i<=n;i++){
        all++;
        for(int j=i+1;j<=n;j++)if((ll)i*j<=n){
            ad[i].push_back(i*j);
            ad[j].push_back(i*j);
            int l=lca(i,j);
            era[l].emplace_back(i,j);
        }
        else {all+=n-j+1;break;}
    }
    dfs(1,0);
    for(int i=1;i<=n;i++)Sum[i]+=Sum[i-1];
    for(int i=1;i<=n;i++){
        cout<<all+Sum[L[i]]<<"\n";
        // cout<<all<<" "<<Sum[L[i]]<<endl;
    }
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 32388kb

input:

5
1 2
4 2
2 5
3 5

output:

15
15
15
15
14

result:

ok 5 number(s): "15 15 15 15 14"

Test #2:

score: -100
Wrong Answer
time: 2050ms
memory: 539456kb

input:

300000
40632 143306
32259 40632
225153 143306
269774 225153
289668 40632
191636 269774
85717 191636
58564 191636
156509 143306
289939 40632
247103 269774
40257 40632
98149 289668
142277 143306
291616 40257
46813 225153
56324 143306
277154 142277
53903 289668
114266 32259
152231 58564
241151 152231
4...

output:

44998684237
44998533536
44998674765
44998673932
44998402638
44998577778
44998481379
44998342835
44998379709
44998433468
44998579547
44998441222
44998458462
44998629932
44998475651
44998413643
44998422418
44998418416
44998428653
44998426277
44998443227
44998414601
44998408892
44998335471
44998631296
...

result:

wrong answer 1st numbers differ - expected: '44999437117', found: '44998684237'