#include <bits/stdc++.h>
//ako ovaj vaso daso misli da me pobedjuje.....
using namespace std;
#define int long long
#define f first
#define s second
const int N = 2e5 + 69;
const int K = 18;
int up[N][K], a[N], tin[N], tout[N], timer, m;
int n, q;
vector<int> g[N];
set<int> st1[N], st2[N];
bool anc(int u, int v) {
return tin[u] <= tin[v] && tout[u] >= tout[v];
}
int Lca(int a, int b) {
if (anc(a, b))
return a;
else if (anc(b, a))
return b;
for (int i = K - 1;i >= 0;i--) {
if (!anc(up[a][i], b) && up[a][i] > 0)
a = up[a][i];
}
return up[a][0];
}
void dfs(int v, int p) {
tin[v] = ++timer;
up[v][0] = p;
for (int i = 1;i < K;i++)
up[v][i] = up[up[v][i - 1]][i - 1];
for (auto u : g[v]) {
if (u == p)
continue;
dfs(u, v);
}
tout[v] = timer;
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int tt = 1;
//cin >> tt;
while (tt--) {
cin >> n >> m >> q;
for (int i = 1;i <= n - 1;i++) {
int a, b;
cin >> a >> b;
g[a].push_back(b);
g[b].push_back(a);
}
dfs(1, 0);
for (int i = 1;i <= m;i++) {
cin >> a[i];
st1[a[i]].insert(i);
}
for (int i = 2;i <= m;i++) {
int x = Lca(a[i], a[i - 1]);
st2[x].insert(i);
}
while (q--) {
int t;
cin >> t;
if (t == 1) {
int i, v;
cin >> i >> v;
int lc1 = -1, lc2 = -1;
if (i > 0)
lc1 = Lca(a[i], a[i - 1]);
if (i < m)
lc2 = Lca(a[i], a[i + 1]);
if (lc1 != -1)
st2[lc1].erase(i);
if (lc2 != -1)
st2[lc2].erase(i + 1);
st1[a[i]].erase(i);
a[i] = v;
st1[a[i]].insert(i);
}
else {
int tl, tr, v;
cin >> tl >> tr >> v;
int x = -1, y = -1;
auto u1 = st1[v].lower_bound(tl);
auto u2 = st2[v].lower_bound(tl);
if (u1 != st1[v].end()) {
if (*u1 <= tr)
x = y = *u1;
}
else if (u2 != st2[v].end()) {
if (*u2 <= tr) {
y = *u2;
x = y - 1;
}
}
cout << x << ' ' << y << '\n';
}
}
}
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
29132 KB |
n=5 |
| 2 |
Incorrect |
9 ms |
29276 KB |
Jury has the answer but participant has not |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
29132 KB |
n=5 |
| 2 |
Incorrect |
9 ms |
29276 KB |
Jury has the answer but participant has not |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
29132 KB |
n=5 |
| 2 |
Incorrect |
9 ms |
29276 KB |
Jury has the answer but participant has not |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 ms |
29132 KB |
n=5 |
| 2 |
Incorrect |
9 ms |
29276 KB |
Jury has the answer but participant has not |
| 3 |
Halted |
0 ms |
0 KB |
- |
