#include <bits/stdc++.h>
using namespace std;
using ll = long long;
//#define int long long
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FORD(i, a, b) for (int i = (b); i >= (a); i --)
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define REPD(i, n) for (int i = (n) - 1; i >= 0; --i)
#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)
constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
/*
Phu Trong from Nguyen Tat Thanh High School for gifted student
*/
template <class X, class Y>
bool minimize(X &x, const Y &y){
X eps = 1e-9;
if (x > y + eps) {x = y; return 1;}
return 0;
}
template <class X, class Y>
bool maximize(X &x, const Y &y){
X eps = 1e-9;
if (x + eps < y) {x = y; return 1;}
return 0;
}
#define MAX 100005
int numNode;
struct Edge{
int u, v;
Edge(){}
Edge(int _u, int _v): u(_u), v(_v){}
int other(int x){return (x ^ u ^ v);}
} edge[MAX];
vector<int> G[MAX];
int label[MAX]; // label(i) as liveness of i-th city
int dep[MAX], head[MAX], heavy[MAX], sz[MAX], pos[MAX], par[MAX];
int cnt = 0;
int pre_dfs(int u, int p = -1){
sz[u] = 1;
par[u] = p;
int bigChild = 0;
for (int &i : G[u]){
int v = edge[i].other(u);
if(v ^ p){
dep[v] = dep[u] + 1;
pre_dfs(v, u);
sz[u] += sz[v];
if (sz[bigChild] < sz[v]){
bigChild = v, heavy[u] = v;
}
}
}
}
deque<pair<int, int>> group[MAX];
void decompose(int u, int p = 1){
pos[u] = ++cnt;
group[p].push_back(make_pair(label[u], 1ll));
head[u] = p;
if(heavy[u]) decompose(heavy[u], p);
for (int &i : G[u]){
int v = edge[i].other(u);
if (v ^ par[u]) if(v ^ heavy[u]){
decompose(v, v);
//make new chain
}
}
}
#define All(x) (x).begin(), (x).end()
struct FenwickTree{
int *F = nullptr;
int n;
vector<pair<int, int>> rollback;
void init (int _n = 0){
this -> n = _n;
F = new int[n + 5];
fill(F, F + n + 1, 0);
}
void upd(int p, int val){
if (val > 0) rollback.push_back(make_pair(p, -val));
for (; p > 0; p -= p & (-p)) F[p] += val;
}
int query(int p){
int res = 0;
for (; p <= n; p += p & (-p)) res += F[p];
return res;
}
void undo(void){
while ((int)rollback.size()){
upd(rollback.back().first, rollback.back().second);
rollback.pop_back();
}
}
} fen;
int ans;
void addEdge(int u, int v){
vector<pair<int, int>> upd;
ans = 0;
while (u > 0){
vector<pair<int, int>> nw_upd;
int length = dep[u] - dep[head[u]] + 1;
while (length > 0 && (int)group[head[u]].size()){
if (length >= group[head[u]].front().second){
length -= group[head[u]].front().second;
nw_upd.emplace_back(group[head[u]].front());
group[head[u]].pop_front();
}
else{
group[head[u]].front().second -= length;
nw_upd.emplace_back(group[head[u]].front().first, length);
length = 0;
}
}
group[head[u]].push_front(make_pair(label[v], dep[u] - dep[head[u]] + 1));
reverse(All(nw_upd));
for (auto&j : nw_upd) upd.push_back(j);
u = par[head[u]];
}
reverse(All(upd));
for (pair<int, int>&x : upd){
int val = x.first, cnt = x.second;
ans += fen.query(val + 1) * cnt;
fen.upd(val, cnt);
}
fen.undo();
}
void process(void){
cin >> numNode;
for (int i = 1; i <= numNode; ++i) cin >> label[i];
for (int i = 1; i < numNode; ++i){
cin >> edge[i].u >> edge[i].v;
G[edge[i].u].emplace_back(i);
G[edge[i].v].emplace_back(i);
}
vector<int> comp;
for (int i = 1; i <= numNode; ++i) comp.push_back(label[i]);
sort(All(comp));
for (int i = 1; i <= numNode; ++i) label[i] = lower_bound(All(comp), label[i]) - comp.begin() + 1;
pre_dfs(1);
decompose(1);
fen.init(numNode);
for (int i = 1; i < numNode; ++i){
int u = edge[i].u, v = edge[i].v;
addEdge(u, v);
cout << ans << '\n';
}
}
signed main(){
#define name "Whisper"
cin.tie(nullptr) -> sync_with_stdio(false);
//freopen(name".inp", "r", stdin);
//freopen(name".out", "w", stdout);
process();
}
Compilation message
construction.cpp: In function 'int pre_dfs(int, int)':
construction.cpp:69:1: warning: no return statement in function returning non-void [-Wreturn-type]
69 | }
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
199 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
199 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
199 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
