#include<bits/stdc++.h>
#define el '\n'
#define fi first
#define sc second
#define int ll
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
using namespace std;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
const int mod=1e9+7;
const int N=1e5+11;
int n, m, q, up[23][N], h[N], nod[4*N], lc[2003][2003], a[N];
vector<int> adj[N];
void dfs(int u, int pa)
{
up[0][u]=pa;
for(int i=1; i<=20; i++) up[i][u]=up[i-1][up[i-1][u]];
for(int v:adj[u])
{
if(v!=pa)
{
h[v]=h[u]+1;
dfs(v, u);
}
}
}
int jump(int k, int u)
{
for(int i=0; i<=20; i++)
{
if(k>>i&1) u=up[i][u];
}
return u;
}
int lca(int u, int v)
{
if(h[u]<h[v]) swap(u, v);
u=jump(h[u]-h[v], u);
if(u==v) return u;
for(int i=20; i>=0; i--)
{
if(up[i][u]!=up[i][v])
{
u=up[i][u];
v=up[i][v];
}
}
return up[0][u];
}
void glow(int id, int l, int r)
{
if(l==r)
{
nod[id]=a[l];
return;
}
int mid=(l+r)/2;
glow(id*2, l, mid);
glow(id*2+1, mid+1, r);
nod[id]=lc[nod[id*2]][nod[id*2+1]];
}
void update(int id, int l, int r, int pos, int val)
{
if(r<pos||pos<l) return;
if(l==r && l==pos)
{
nod[id]=val;
return;
}
int mid=(l+r)/2;
if(pos<=mid) update(id*2, l, mid, pos, val);
else update(id*2+1, mid+1, r, pos, val);
nod[id]=lc[nod[id*2]][nod[id*2+1]];
}
int get(int id, int l, int r, int u, int v)
{
if(r<u || v<l) return n+1;
if(u<=l && r<=v) return nod[id];
int mid=(l+r)/2;
int s1=get(id*2, l, mid, u, v);
int s2=get(id*2+1, mid+1, r, u, v);
return lc[s1][s2];
}
void sub1()
{
while(q--)
{
int tt;
cin >> tt;
if(tt==1)
{
int pos, v;
cin >> pos >> v;
update(1, 1, m, pos, v);
a[pos]=v;
}
else
{
int l, r, v;
cin >> l >> r >> v;
int ch=0, s1, s2;
for(int i=l; i<=l; i++)
{
if(ch) continue;
int low=i, high=r;
while(low<=high)
{
int mid=(low+high)/2;
int cc=get(1, 1, m, i, mid);
if(h[cc]>h[v]) low=mid+1;
else if(h[cc]<h[v]) high=mid-1;
else if(cc==v)
{
ch=1;
s1=i;
s2=mid;
break;
}
else break;
}
}
if(ch) cout << s1 << ' ' << s2 << el;
else cout << -1 << ' ' << -1 << el;
}
}
}
void sol()
{
cin >> n >> m >> q;
for(int i=1; i<n; i++)
{
int u, v;
cin >> u >> v;
adj[u].push_back(v);
adj[v].push_back(u);
}
h[1]=1;
dfs(1, 0);
for(int i=1; i<=m; i++) cin >> a[i];
for(int i=1; i<=n; i++) for(int j=i; j<=n; j++) lc[i][j]=lc[j][i]=lca(i, j);
for(int i=1; i<=n; i++) lc[n+1][i]=lc[i][n+1]=i;
glow(1, 1, m);
// cout << get(1, 1, m, 1, 1) << el;
sub1();
// cout << lca(5, 3);
}
signed main()
{
// freopen("divisor.INP", "r", stdin);
// freopen("divisor.OUT", "w", stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
int t=1;
//cin >> t;
while(t--)
{
sol();
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2904 KB |
n=5 |
| 2 |
Incorrect |
2 ms |
3420 KB |
Jury has the answer but participant has not |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2904 KB |
n=5 |
| 2 |
Incorrect |
2 ms |
3420 KB |
Jury has the answer but participant has not |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2904 KB |
n=5 |
| 2 |
Incorrect |
2 ms |
3420 KB |
Jury has the answer but participant has not |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2904 KB |
n=5 |
| 2 |
Incorrect |
2 ms |
3420 KB |
Jury has the answer but participant has not |
| 3 |
Halted |
0 ms |
0 KB |
- |
