#define wiwihorz
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("sse")
#pragma loop-opt(on)
#define rep(i, a, b) for(int i = a; i <= b; i++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define ceil(a, b) ((a + b - 1) / (b))
#define all(a) a.begin(), a.end()
using namespace std;
#define INF 1000000000000000000
#define MOD 1000000007
#define eps (1e-9)
#define int long long int
#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())
#ifdef wiwihorz
#define print(a...) cerr << "Line " << __LINE__, kout("[" + string(#a) + "] = ", a)
void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
void kout() { cerr << endl; }
template<class T1, class ... T2>void kout(T1 a, T2 ... e){cerr<<a<<" ",kout(e...);}
#else
#define print(...) 0
#define vprint(...) 0
#endif
namespace solver {
int n, m, q, timestamp;
vector<vector<int>> mp;
vector<int> ans, top, par, mx, id, sz;
vector<int> v, es, x, y, vis, pos, pre;
void init_(int _n, int _m, int _q) {
n = _n, m = _m, q = _q;
timestamp = 0;
vis.assign(n, 1), pre.assign(n, 0);
x.assign(n, 0), y.assign(n, 0);
es.assign(n, 0);
mp.assign(n + 1, vector<int>());
ans.assign(n + 1, 1);
top.assign(n + 1, 0);
par.assign(n + 1, 0);
mx.assign(n + 1, 0);
pos.assign(n + 1, 0);
sz.assign(n + 1, 0);
id.assign(n + 1, 0);
pre.assign(n + 1, 0);
v.assign(2 * n + 1, 0);
}
void get_info(int x, int p) {
sz[x] = 1;
for(auto i : mp[x]) if(i != p) {
int to = es[i] ^ x;
get_info(to, i);
sz[x] += sz[to], par[to] = x;
if(sz[to] > sz[mx[x]]) mx[x] = to;
}
}
void hld(int x, int p, int tp) {
top[x] = tp;
id[x] = ++timestamp;
pos[timestamp] = x;
if(mx[x]) hld(mx[x], x, tp);
for(auto i : mp[x]) {
int to = es[i] ^ x;
if(to == mx[x] || to == p) continue;
hld(to, x, to);
}
}
int get(int L, int R) {
return (L + R) | (L != R);
}
void pull(int L, int R) {
int mid = (L + R) / 2, nd = get(L, R);
v[nd] = max(v[get(L, mid)], v[get(mid + 1, R)]);
}
void modify(int L, int R, int id, int val) {
int mid = (L + R) / 2, nd = get(L, R);
if(L == R) v[nd] = val;
else {
if(id <= mid) modify(L, mid, id, val);
else modify(mid + 1, R, id, val);
pull(L, R);
}
}
int query(int L, int R, int l, int r) {
int mid = (L + R) / 2, nd = get(L, R);
if(l > R || r < L) return 0;
else if(l <= L && r >= R) return v[nd];
else return max(query(L, mid, l, r), query(mid + 1, R, l, r));
}
void change(int num) {
modify(1, n, id[x[num]], (vis[num] ? id[x[num]] : 0));
vis[num] ^= 1;
}
int get_id(int x) {
int cur = x;
while(cur) {
int pa = top[cur];
int val = query(1, n, id[pa], id[cur]);
if(!val) cur = par[pa];
else return pos[val];
}
assert(0);
}
void solve() {
get_info(1, -1);
hld(1, 1, 1);
modify(1, n, id[1], id[1]);
rep(i, 1, n - 1) if(id[x[i]] < id[y[i]]) swap(x[num], y[num]);
rep(i, 1, n - 1) change(i);
rep(i, 1, m) {
int cur; cin >> cur;
if(!vis[cur]) {
int a = get_id(x[cur]);
int b = get_id(y[cur]);
pre[cur] = ans[a] + ans[b] - pre[cur];
ans[b] = pre[cur];
change(cur);
}
else {
change(cur);
int a = get_id(x[cur]);
int b = get_id(y[cur]);
pre[cur] = ans[b];
ans[a] = ans[b];
}
}
rep(i, 1, q) {
int cur; cin >> cur;
cout << ans[get_id(cur)] << "\n";
}
}
};
using namespace solver;
signed main() {
ios::sync_with_stdio(false), cin.tie(0);
int n, m, q;
cin >> n >> m >> q;
init_(n, m, q);
rep(i, 1, n - 1) {
int a, b;
cin >> a >> b;
x[i] = a, y[i] = b;
es[i] = a ^ b;
mp[a].push_back(i);
mp[b].push_back(i);
}
solve();
return 0;
}
Compilation message
synchronization.cpp:5: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
5 | #pragma loop-opt(on)
|
synchronization.cpp:24:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
24 | void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
| ^~~~
synchronization.cpp:24:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
24 | void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
| ^~~~
synchronization.cpp: In function 'void solver::solve()':
synchronization.cpp:113:51: error: 'num' was not declared in this scope; did you mean 'enum'?
113 | rep(i, 1, n - 1) if(id[x[i]] < id[y[i]]) swap(x[num], y[num]);
| ^~~
| enum
