#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl
#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)
template<typename T>
void amin(T &a, T b) {
a = min(a,b);
}
template<typename T>
void amax(T &a, T b) {
a = max(a,b);
}
#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif
/*
refs:
https://youtu.be/N69P-6MZor0?list=PLg_Krngrs0eC_1vn0dTjyPZMkwBOcVsgH&t=1328
edi
*/
const int MOD = 1e9 + 7;
const int N = 1e6 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;
vector<int> adj[2][N];
template<int t>
struct lca_algo {
// LCA template (for graphs with 1-based indexing)
int LOG = 1;
vector<int> depth;
vector<vector<int>> up;
vector<int> tin, tout;
vector<int> order;
int timer = 1;
lca_algo() {
}
lca_algo(int n, int r) {
lca_init(n,r);
}
void lca_init(int n, int r) {
while ((1 << LOG) < n) LOG++;
up = vector<vector<int>>(n + 1, vector<int>(LOG, r));
depth = vector<int>(n + 1);
tin = vector<int>(n + 1);
tout = vector<int>(n + 1);
lca_dfs(r, -1);
}
void lca_dfs(int node, int par) {
tin[node] = timer++;
order.pb(node);
trav(child, adj[t][node]) {
if (child == par) conts;
up[child][0] = node;
rep1(j, LOG - 1) {
up[child][j] = up[up[child][j - 1]][j - 1];
}
depth[child] = depth[node] + 1;
lca_dfs(child, node);
}
tout[node] = timer-1;
}
int lift(int u, int k) {
rep(j, LOG) {
if (k & (1 << j)) {
u = up[u][j];
}
}
return u;
}
int query(int u, int v) {
if (depth[u] < depth[v]) swap(u, v);
int k = depth[u] - depth[v];
u = lift(u, k);
if (u == v) return u;
rev(j, LOG - 1, 0) {
if (up[u][j] != up[v][j]) {
u = up[u][j];
v = up[v][j];
}
}
u = up[u][0];
return u;
}
int get_dis(int u, int v) {
int lca = query(u, v);
return depth[u] + depth[v] - 2 * depth[lca];
}
bool is_ances(int u, int v){
return tin[u] <= tin[v] and tout[u] >= tout[v];
}
};
void solve(int test_case)
{
int n,k,q,t; cin >> n >> k >> q >> t;
vector<int> roots(2);
rep(t,2){
rep1(u,n){
int p; cin >> p;
if(p == -1){
roots[t] = u;
}
else{
adj[t][p].pb(u), adj[t][u].pb(p);
}
}
}
lca_algo<0> lca0(n,roots[0]);
lca_algo<1> lca1(n,roots[1]);
auto nodes = lca0.order;
while(sz(nodes) > k) nodes.pop_back();
rep(i,k) cout << nodes[i] << " ";
cout << endl;
fflush(stdout);
vector<pii> ord;
trav(u,nodes) ord.pb({lca1.tin[u],u});
sort(all(ord));
rep(i,k-1){
int u = ord[i].ss, v = ord[i+1].ss;
cout << "? " << u << " " << v << endl;
}
cout << "!" << endl;
fflush(stdout);
vector<int> depth0(n+5), depth1(n+5);
pii virtual_root = {inf1,-1};
rep(i,k-1){
int u = ord[i].ss, v = ord[i+1].ss;
int l0 = lca0.query(u,v), l1 = lca1.query(u,v);
int d1,d2,d3,d4; cin >> d1 >> d2 >> d3 >> d4;
depth0[l0] = depth0[u]-d1;
depth0[v] = depth0[u]-d1+d2;
depth1[l1] = depth1[u]-d3;
depth1[v] = depth1[u]-d3+d4;
pii px = {lca1.depth[l1],l1};
amin(virtual_root,px);
}
// tree 0 => relative to roots[0]
{
int d = -depth0[roots[0]];
rep1(u,n){
depth0[u] += d;
}
}
// tree 1 => relative to virtual_root.ss
{
int d = -depth1[virtual_root.ss];
rep1(u,n){
depth1[u] += d;
}
}
vector<pii> queries(t+5);
rep1(i,t) cin >> queries[i].ff >> queries[i].ss;
rep1(i,t){
auto [u,v] = queries[i];
int l0 = lca0.query(u,v), l1 = lca1.query(u,v);
int d0 = depth0[u]+depth0[v]-2*depth0[l0];
int d1 = depth1[u]+depth1[v]-2*depth1[l1];
cout << d0 << " " << d1 << endl;
}
fflush(stdout);
}
int main()
{
fastio;
int t = 1;
// cin >> t;
rep1(i, t) {
solve(i);
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1774 ms |
236132 KB |
Time limit exceeded (wall clock) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1648 ms |
236360 KB |
Time limit exceeded (wall clock) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1635 ms |
234892 KB |
Time limit exceeded (wall clock) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
3582 ms |
412232 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
3534 ms |
410008 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
