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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 |
---|---|---|---|---|---|---|---|---|---|
#121331 | #4839. Smaller LCA | memset0 | WA | 2633ms | 143180kb | C++20 | 6.7kb | 2023-07-07 23:09:44 | 2023-07-07 23:09:46 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int N = 3e5 + 9;
int n, rt, all, tot, tim, fa[N], siz[N], mxp[N], dfn[N], ans[N];
bool vis[N];
vector<int> cur, G[N];
vector<tuple<int, int, int, int>> qry;
namespace ini {
int tot, fa[N], dfn[N], siz[N];
long long sum, pre[N];
void dfs(int u) {
dfn[u] = ++tot;
siz[u] = 1;
for (int v : G[u])
if (v != fa[u]) {
fa[v] = u;
dfs(v);
siz[u] += siz[v];
}
}
void push(int u, int x) {
pre[dfn[u]] += x;
pre[dfn[u] + 1] -= x;
}
void push(int u, int v, int x) {
if (v == fa[u]) {
pre[0] += x;
pre[dfn[u]] -= x;
pre[dfn[u] + siz[u]] += x;
} else {
pre[dfn[v]] += x;
pre[dfn[v] + siz[v]] -= x;
}
}
inline void push(int u, int v, int w, int x) {
// fprintf(stderr, "push %d %d %d : %d\n", u, v, w, x);
pre[0] += x;
push(u, v, -x);
// for (int i = 0; i <= n; i++) cerr << pre[i] << " \n"[i == n];
push(u, w, -x);
// for (int i = 0; i <= n; i++) cerr << pre[i] << " \n"[i == n];
}
void init() {
dfs(1);
// for (int i = 1; i <= n; i++) cerr << dfn[i] << " \n"[i == n];
// for (int i = 1; i <= n; i++) cerr << siz[i] << " \n"[i == n];
}
void solve() {
// for (int i = 0; i <= n; i++) cerr << pre[i] << " \n"[i == n];
for (int i = 1; i <= n; i++) pre[i] += pre[i - 1];
// for (int i = 0; i <= n; i++) cerr << pre[i] << " \n"[i == n];
for (int i = 1; i <= n; i++) ans[i] += pre[dfn[i]];
}
} // namespace ini
struct CountNode {
int n, tim, s[N << 1];
vector<int> ans, valx, valy;
vector<pair<int, int>> nod;
vector<tuple<int, int, int>> qry;
inline void add(int k) {
for (; k <= n; k += k & -k) s[k]++;
}
inline void ask(int k, int &x) {
for (; k; k -= k & -k) x += s[k];
}
inline void addNode(int x, int y) {
// cerr << "counter::addNode " << x << " " << y << endl;
nod.emplace_back(x, y);
valx.push_back(x), valy.push_back(y);
}
inline void addQuery(int x, int y) {
// cerr << "counter::addQuery " << x << " " << y << endl;
qry.emplace_back(x, y, qry.size());
// valx.push_back(x), valy.push_back(y);
}
inline int getQuery() {
// cerr << "counter::getQuery " << ans[tim] << endl;
return ans[tim++];
}
void init() {
// cerr << "counter::init" << endl;
tim = 0, nod.clear(), qry.clear(), valx.clear(), valy.clear();
}
void solve() {
ans.resize(qry.size());
fill(ans.begin(), ans.end(), 0);
if (!nod.size() || !qry.size()) return;
if (nod.size() < 5) {
for (auto &[xx, yy] : nod) {
for (auto &[x, y, i] : qry) {
if (xx <= x && yy <= y) ans[i]++;
}
}
return;
}
cerr << "counter::solve " << nod.size() << " " << qry.size() << endl;
sort(valx.begin(), valx.end());
sort(valy.begin(), valy.end());
valx.erase(unique(valx.begin(), valx.end()), valx.end());
valy.erase(unique(valy.begin(), valy.end()), valy.end());
n = valy.size();
fill(s, s + n + 1, 0);
for (auto &[x, y] : nod) {
x = lower_bound(valx.begin(), valx.end(), x) - valx.begin() + 1;
y = lower_bound(valy.begin(), valy.end(), y) - valy.begin() + 1;
// cerr << "node " << x << " " << y << endl;
}
for (auto &[x, y, i] : qry) {
x = upper_bound(valx.begin(), valx.end(), x) - valx.begin();
y = upper_bound(valy.begin(), valy.end(), y) - valy.begin();
// cerr << "query " << x << " " << y << " " << i << endl;
}
sort(nod.begin(), nod.end());
sort(qry.begin(), qry.end());
int i = 0, j = 0;
for (int x = 1; x <= valx.size(); x++) {
while (i < nod.size() && nod[i].first == x) {
add(nod[i].second), i++;
}
while (j < qry.size() && get<0>(qry[j]) == x) {
ask(get<1>(qry[j]), ans[get<2>(qry[j])]), j++;
}
}
}
} counter;
void getroot(int u) {
siz[u] = 1, mxp[u] = 0;
for (int v : G[u])
if (!vis[v] && v != fa[u]) {
fa[v] = u;
getroot(v);
siz[u] += siz[v];
mxp[u] = max(mxp[u], siz[v]);
}
mxp[u] = max(mxp[u], all - siz[u]);
if (!rt || mxp[u] < mxp[rt]) rt = u;
}
void getnode(int u) {
// cerr << "get node " << u << endl;
cur.push_back(u);
dfn[u] = ++tot, siz[u] = 1;
for (int v : G[u]) {
if (!vis[v] && v != fa[u]) {
fa[v] = u;
getnode(v);
siz[u] += siz[v];
}
}
}
void getquery(int u) {
// cerr << "get query " << u << endl;
for (int v : G[u])
if (!vis[v] && v != fa[u]) {
counter.addQuery(dfn[v] + siz[v] - 1, u - 1);
counter.addQuery(dfn[v] - 1, u - 1);
getquery(v);
}
}
void pushans(int u) {
// cerr << "push ans " << u << " " << w << " " << tot << endl;
for (int v : G[u])
if (!vis[v] && v != fa[u]) {
int cur = counter.getQuery();
cur -= counter.getQuery();
ini::push(u, v, fa[u], cur);
pushans(v);
}
}
void solve(int u) {
// cerr << "=== solve " << u << " ===" << endl;
vis[u] = 1;
vector<int> ch;
set<pair<int, int>> pre = {{u, 0}};
map<int, vector<pair<int, int>>> p;
tot = 1, dfn[u] = siz[u] = 1;
for (int v : G[u]) {
if (!vis[v]) ch.push_back(v);
}
for (int v : ch) {
fa[v] = u;
cur.clear(), getnode(v);
siz[u] += siz[v];
p[v] = {};
for (int x : cur)
for (auto &[y, w] : pre) {
if ((long long)x * y < n) {
p[v].emplace_back(x, y);
if (w) p[w].emplace_back(y, x);
if (u > (long long)x * y) {
ini::push(u, v, w, 1);
}
} else {
break;
}
}
for (int x : cur) pre.insert(make_pair(x, v));
}
qry.clear(), tim = 0;
counter.init();
for (int v : ch)
for (auto &[x, y] : p[v]) {
counter.addNode(dfn[x], x * y);
}
for (int v : ch) getquery(v);
counter.solve();
for (int v : ch) pushans(v);
// cerr << tim << " " << qry.size() << endl;
for (int v : ch) {
rt = 0, all = siz[v], getroot(v);
// fprintf(stderr, "%d -> %d :: rt = %d, all = %d, mxp = %d\n", u, v, rt, all, mxp[rt]);
solve(rt);
}
}
int main() {
#ifdef memset0
// freopen("1.in", "r", stdin);
freopen("2.in", "r", stdin);
freopen("2.out", "w", stdout);
#endif
ios::sync_with_stdio(0), cin.tie(0);
cin >> n;
for (int u, v, i = 1; i < n; i++) {
cin >> u >> v;
G[u].push_back(v);
G[v].push_back(u);
}
ini::init();
rt = 0, all = n, getroot(1), solve(rt);
ini::solve();
long long tot = (long long)n * (n - 1) / 2 + n;
// for (int i = 1; i <= n; i++) cerr << ans[i] << " \n"[i == n];
cerr << "time: " << clock() / (double)CLOCKS_PER_SEC << endl;
for (int i = 1; i <= n; i++) cout << (tot - ans[i]) << '\n';
cerr << "time: " << clock() / (double)CLOCKS_PER_SEC << endl;
}
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 22160kb
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: 2633ms
memory: 143180kb
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:
44999598606 44999765831 44999775507 44999774550 44999176105 44999645998 44999424394 44999244111 44999159706 44999269916 44999762470 44999274714 44999351996 44999469836 44999582699 44999522047 44999260755 44999373110 44999379819 44999263307 44999711931 44999370888 44999515340 44999242268 44999514410 ...
result:
wrong answer 1st numbers differ - expected: '44999437117', found: '44999598606'