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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#528863 | #4839. Smaller LCA | Nanani_fan# | WA | 1955ms | 540588kb | C++20 | 3.4kb | 2024-08-23 23:24:33 | 2024-08-23 23:24:33 |
Judging History
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){
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);
}
for(auto [p,q]:era[x])if(x<=p*q){
add(1,n,1);
if(p!=x&&q!=x)add(L[x],R[x],-2);
else add(L[x],R[x],-1),add(L[x],R[x],-1);
update(rt,1,n,p*q,-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;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 30320kb
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: 1955ms
memory: 540588kb
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:
44997931170 44998430694 44998599347 44998598511 44998268130 44998500801 44998341459 44998187085 44998245204 44998303662 44998498225 44998311430 44998324941 44998023095 44998375157 44998237975 44998292522 44998278434 44998288675 44998296392 44998336159 44998274621 44998233265 44998179536 44997968353 ...
result:
wrong answer 1st numbers differ - expected: '44999437117', found: '44997931170'