#include <bits/stdc++.h>
using namespace std;
const int MAX_N = 70002;
const int INF = 1e9;
vector<int> g[MAX_N], tree[MAX_N];
int n, k;
struct SegmentTree {
typedef int (*F)(int, int);
F merge;
int identity;
int tree[MAX_N * 4]{}, lazy[MAX_N * 4]{};
SegmentTree(F func, int identity) : merge(func), identity(identity) {
for (int i = 0; i < MAX_N * 4; ++i) tree[i] = lazy[i] = identity;
}
void push(int node, int l, int r) {
if (lazy[node] != identity) {
tree[node] = merge(tree[node], lazy[node]);
if (l != r) {
lazy[node * 2] = merge(lazy[node * 2], lazy[node]);
lazy[node * 2 + 1] = merge(lazy[node * 2 + 1], lazy[node]);
}
}
lazy[node] = identity;
}
void update(int s, int e, int val, int node = 1, int l = 1, int r = n) {
push(node, l, r);
if (e < l || r < s) return;
if (s <= l && r <= e) {
lazy[node] = val;
push(node, l, r);
return;
}
int mid = (l + r) / 2;
update(s, e, val, node * 2, l, mid);
update(s, e, val, node * 2 + 1, mid + 1, r);
tree[node] = merge(tree[node * 2], tree[node * 2 + 1]);
}
int query(int s, int e, int node = 1, int l = 1, int r = n) {
push(node, l, r);
if (e < l || r < s) return identity;
if (s <= l && r <= e) return tree[node];
int mid = (l + r) / 2;
return merge(query(s, e, node * 2, l, mid), query(s, e, node * 2 + 1, mid + 1, r));
}
};
int _mn(int a, int b) {
return min(a, b);
}
int _mx(int a, int b) {
return max(a, b);
}
SegmentTree minSeg(_mn, INF);
SegmentTree maxSeg(_mx, -INF);
void makeTree(int here = 1, int prev = 0) {
for (auto there: g[here]) {
if (there == prev) continue;
tree[here].push_back(there);
makeTree(there, here);
}
}
int sz[MAX_N], dep[MAX_N], par[MAX_N], top[MAX_N], in[MAX_N];
void dfs1(int here = 1) {
sz[here] = 1;
for (auto &there: tree[here]) {
dep[there] = dep[here] + 1;
par[there] = here;
dfs1(there);
sz[here] += sz[there];
if (sz[there] > sz[tree[here][0]]) swap(there, tree[here][0]);
}
}
int counter;
void dfs2(int here = 1) {
in[here] = ++counter;
for (auto there: tree[here]) {
top[there] = there == tree[here][0] ? top[here] : there;
dfs2(there);
}
}
void update(int a, int b, int val, bool qType) {
while (top[a] != top[b]) {
if (dep[top[a]] < dep[top[b]]) swap(a, b);
int st = top[a];
qType ? minSeg.update(in[st], in[a], val) : maxSeg.update(in[st], in[a], val);
a = par[st];
}
if (a == b) return;
if (dep[a] > dep[b]) swap(a, b);
qType ? minSeg.update(in[a] + 1, in[b], val) : maxSeg.update(in[a] + 1, in[b], val);
}
pair<int, int> query(int a, int b) {
pair<int, int> ret = {INF, -INF};
while (top[a] != top[b]) {
if (dep[top[a]] < dep[top[b]]) swap(a, b);
int st = top[a];
ret.first = min(ret.first, minSeg.query(in[st], in[a]));
ret.second = max(ret.second, maxSeg.query(in[st], in[a]));
a = par[st];
}
if (a == b) return ret;
if (dep[a] > dep[b]) swap(a, b);
ret.first = min(ret.first, minSeg.query(in[a] + 1, in[b]));
ret.second = max(ret.second, maxSeg.query(in[a] + 1, in[b]));
return ret;
}
struct Query {
int type, x, y, z;
};
int mn[MAX_N], mx[MAX_N], cnt[MAX_N], ans[MAX_N], ans2[MAX_N], chk[MAX_N];
vector<int> bench[MAX_N];
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
cin >> n;
for (int i = 0; i < n - 1; ++i) {
int a, b;
cin >> a >> b;
g[a].push_back(b);
g[b].push_back(a);
}
cin >> k;
makeTree();
dfs1();
dfs2();
vector<int> zz;
for (int i = 0; i < k; ++i) {
char q;
int x, y, z;
cin >> q >> x >> y >> z;
if (q == 'M') {
update(x, y, z, false);
} else {
update(x, y, z, true);
}
zz.push_back(z);
}
sort(zz.begin(), zz.end());
map<int, int> idx;
zz.resize(unique(zz.begin(), zz.end()) - zz.begin());
for (int i = 0; i < zz.size(); ++i) {
idx[zz[i]] = i;
}
for (int i = 2; i <= n; ++i) {
auto [mini, maxi] = query(i, par[i]);
if (mini != INF) {
mn[i] = idx[mini];
bench[idx[mini]].push_back(i);
}
if (maxi != -INF) {
mx[i] = idx[maxi];
bench[idx[maxi]].push_back(i);
}
}
set<pair<int, int>> s;
for (int i = 0; i < zz.size(); ++i) {
cnt[i] = bench[i].size();
s.insert({bench[i].size(), i});
}
while (!s.empty()) {
int id = s.begin()->second;
s.erase(s.begin());
chk[id] = 1;
int v = 0;
for (auto node: bench[id])
if (ans[node] == 0) {
v = node;
break;
}
if (mn[v] != INF && !chk[idx[mn[v]]]) {
s.erase({cnt[idx[mn[v]]], idx[mn[v]]});
cnt[idx[mn[v]]]--;
s.insert({cnt[idx[mn[v]]], idx[mn[v]]});
}
if (idx[mx[v]] != -1 && !chk[idx[mx[v]]]) {
s.erase({cnt[idx[mx[v]]], idx[mx[v]]});
cnt[idx[mx[v]]]--;
s.insert({cnt[idx[mx[v]]], idx[mx[v]]});
}
ans[v] = zz[id];
}
for (int i = 2; i <= n; ++i) {
cout << i << ' ' << par[i] << ' ';
if (ans[i] != INF)
cout << ans[i];
else {
cout << mx[i];
}
cout << '\n';
}
}
Compilation message
minmaxtree.cpp: In function 'int main()':
minmaxtree.cpp:167:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
167 | for (int i = 0; i < zz.size(); ++i) {
| ~~^~~~~~~~~~~
minmaxtree.cpp:183:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
183 | for (int i = 0; i < zz.size(); ++i) {
| ~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
10744 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
173 ms |
28028 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
110 ms |
19792 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
10744 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
