#include "bits/stdc++.h"
using namespace std;
#define task ""
#define ll long long
#define endl '\n'
#define u first
#define v second
#define vall(a) (a).begin(), (a).end()
#define sze(a) (int)a.size()
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ep emplace_back
#define pb push_back
#define pf push_front
const ll mod = 1e9 + 7;
const int N = 1e5 + 5;
const ll oo = 1e18;
bool START;
int n, m, q, in[N], out[N], par[N][19], t = 0;
pii e[N];
bool vis[N];
vector<int> adj[N];
// so lan doc sol roi moi biet lam : 4 / 4
struct BIT {
int bit[N];
void add(int idx, int delta) {
for (; idx <= n; idx += idx & -idx) bit[idx] += delta;
}
void upd(int l, int r, int delta) {
add(l, delta);
add(r + 1, -delta);
}
int get(int idx) {
int ans = 0;
for (; idx > 0; idx -= idx & -idx) ans += bit[idx];
return ans;
}
} bit;
void dfs(int u, int p) {
in[u] = ++t;
for (int v : adj[u]) {
if (v == par[u][0]) continue;
par[v][0] = u;
for (int i = 1; i < 19; ++i) par[v][i] = par[par[v][i - 1]][i - 1];
dfs(v, u);
}
out[u] = t;
}
int find(int u) {
for (int i = 18; i >= 0; --i) if (bit.get(in[par[u][i]]) == bit.get(in[u])) u = par[u][i];
return u;
}
int ans[N], lst[N];
inline void solve() {
dfs(1, 0);
for (int i = 1; i <= n; ++i) {
ans[i] = 1;
bit.upd(in[i], out[i], 1);
}
for (int i = 1; i <= m; ++i) {
int x; cin >> x;
auto[u, v] = e[x];
if (par[v][0] != u) swap(u, v);
if (!vis[x]) {
ans[find(u)] += ans[v] - lst[v];
bit.upd(in[v], out[v], -1);
} else {
ans[v] = lst[v] = ans[find(u)];
bit.upd(in[v], out[v], 1);
}
vis[x] ^= 1;
}
while(q--) {
int x; cin >> x;
cout << ans[find(x)] << endl;
}
}
inline void input() {
cin >> n >> m >> q;
for (int i = 1; i < n; ++i) {
cin >> e[i].u >> e[i].v;
adj[e[i].u].pb(e[i].v);
adj[e[i].v].pb(e[i].u);
}
return solve();
}
bool END;
int main() {
if(fopen(task ".inp", "r")) {
freopen(task ".inp", "r", stdin);
freopen(task ".out", "w", stdout);
}
ios_base::sync_with_stdio(false);
cin.tie(nullptr); cout.tie(nullptr);
input();
cerr << endl << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << 's' << endl;
cerr << "Memory: " << fabs ((&END - &START)) / 1048576.0 << "MB\n";
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
synchronization.cpp: In function 'int main()':
synchronization.cpp:107:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
107 | freopen(task ".inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
synchronization.cpp:108:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
108 | freopen(task ".out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |