//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include <bits/stdc++.h>
#define file ""
#define all(x) x.begin(), x.end()
#define fr first
#define sc second
#define pb push_back
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
const int N = 3e5;
const int inf = 1e9 + 5;
map <int, pii> mp;
int a[N], tin[N], tout[N], t[4 * N], timer = 1;
int up[N][25];
vector <int> g[N];
multiset <int> s [N];
void dfs (int x, int pr) {
tin[x] = timer++;
up[x][0] = pr;
for (int i = 1; i <= 20; i++) {
up[x][i] = up[up[x][i - 1]][i - 1];
}
for (int to : g[x]) {
if (to != pr) dfs(to, x);
}
tout[x] = timer;
}
bool upper (int x, int y) {
if (tin[x] <= tin[y] && tout[x] >= tout[y]) return true;
return false;
}
int lca (int x, int y) {
if (x == 0) return y;
if (y == 0) return x;
if (upper(x, y)) return x;
if (upper(y, x)) return y;
for (int i = 20; i >= 0; i--) {
if (!upper(up[x][i], y)) x = up[x][i];
}
return up[x][0];
}
int main(){
ios_base :: sync_with_stdio(false);
cin.tie(NULL);
srand(time(NULL));
int n, m, q;
cin >> n >> m >> q;
int u, v, tp;
for (int i = 1; i < n; i++) {
cin >> u >> v;
g[u].pb(v);
g[v].pb(u);
}
dfs(1, 1);
for (int i = 1; i <= m; i++) {
cin >> a[i];
s[a[i]].insert(i);
}
a[0] = a[1];
for (int i = 1; i < m; i++) {
s[lca(a[i], a[i + 1])].insert(i);
}
while (q--) {
cin >> tp;
if (tp == 1) {
int pos, val;
cin >> pos >> val;
if (pos > 1 && pos < m) {
s[a[pos]].erase(pos);
s[lca(a[pos], a[pos + 1])].erase(pos);
s[lca(a[pos], a[pos - 1])].erase(pos - 1);
a[pos] = val;
s[a[pos]].insert(pos);
s[lca(a[pos], a[pos + 1])].insert(pos);
s[lca(a[pos], a[pos - 1])].insert(pos - 1);
}
else if (pos == 1) {
s[a[pos]].erase(pos);
s[lca(a[pos], a[pos + 1])].erase(pos);
a[pos] = val;
s[a[pos]].insert(pos);
s[lca(a[pos], a[pos + 1])].insert(pos);
}
else {
s[a[pos]].erase(pos);
s[lca(a[pos], a[pos - 1])].erase(pos - 1);
a[pos] = val;
s[a[pos]].insert(pos);
s[lca(a[pos], a[pos - 1])].insert(pos - 1);
}
}
else {
int l, r, val;
cin >> l >> r >> val;
auto it = s[val].lower_bound(l);
if (*it != m + 1) {
int ans = *it;
if (a[ans] == val && ans >= l && ans <= r) cout << ans << " " << ans;
else if (ans >= l && ans + 1 <= r) cout << ans << " " << ans + 1;
else cout << -1 << " " << -1;
cout << "\n";
}
else cout << -1 << " " << -1 << "\n";
}
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
11 ms |
21460 KB |
n=5 |
| 2 |
Correct |
11 ms |
21460 KB |
n=100 |
| 3 |
Correct |
11 ms |
21460 KB |
n=100 |
| 4 |
Correct |
11 ms |
21460 KB |
n=100 |
| 5 |
Incorrect |
11 ms |
21512 KB |
Jury has the answer but participant has not |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
11 ms |
21460 KB |
n=5 |
| 2 |
Correct |
11 ms |
21460 KB |
n=100 |
| 3 |
Correct |
11 ms |
21460 KB |
n=100 |
| 4 |
Correct |
11 ms |
21460 KB |
n=100 |
| 5 |
Incorrect |
11 ms |
21512 KB |
Jury has the answer but participant has not |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
11 ms |
21460 KB |
n=5 |
| 2 |
Correct |
11 ms |
21460 KB |
n=100 |
| 3 |
Correct |
11 ms |
21460 KB |
n=100 |
| 4 |
Correct |
11 ms |
21460 KB |
n=100 |
| 5 |
Incorrect |
11 ms |
21512 KB |
Jury has the answer but participant has not |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
11 ms |
21460 KB |
n=5 |
| 2 |
Correct |
11 ms |
21460 KB |
n=100 |
| 3 |
Correct |
11 ms |
21460 KB |
n=100 |
| 4 |
Correct |
11 ms |
21460 KB |
n=100 |
| 5 |
Incorrect |
11 ms |
21512 KB |
Jury has the answer but participant has not |
| 6 |
Halted |
0 ms |
0 KB |
- |
