Submission #727331

#	Time	Username	Problem	Language	Result	Execution time	Memory
727331		amunduzbaev	Prize (CEOI22_prize)	C++17	100 / 100	3180 ms	551112 KiB

Main

#include "bits/stdc++.h"
using namespace std;
 
#define ar array
typedef long long ll;
#define int ll

const int N = 1e6 + 5;
vector<int> G[2][N];
int tin[2][N], tout[2][N], par[2][N][20];
int d[2][N];

signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n, k, q, T; cin >> n >> k >> q >> T;
	int R[2] {};
	for(int i=1;i<=n;i++){
		int p; cin >> p;
		if(~p){
			G[0][p].push_back(i);
		} else {
			R[0] = i;
		}
	}
	for(int i=1;i<=n;i++){
		int p; cin >> p;
		if(~p){
			G[1][p].push_back(i);
		} else {
			R[1] = i;
		}
	}
	
	for(int c=0;c<2;c++){
		int t = 0;
		tout[c][0] = N;
		function<void(int)> dfs = [&](int u){
			tin[c][u] = ++t;
			for(int j=1;j<20;j++){
				par[c][u][j] = par[c][par[c][u][j-1]][j-1];
			}
			for(auto x : G[c][u]){
				par[c][x][0] = u;
				dfs(x);
			}
			tout[c][u] = t;
		};
		dfs(R[c]);
	}
	
	vector<int> p;
	function<void(int)> dfs = [&](int u){
		if(tin[0][u] <= k){
			p.push_back(u);
		}
		for(auto x : G[0][u]){
			dfs(x);
		}
	};
	dfs(R[0]);
	for(auto x : p){
		cout<<x<<" ";
	} cout<<endl;
	
	auto is = [&](int t, int a, int b){
		return (tin[t][a] <= tin[t][b] && tin[t][b] <= tout[t][a]);
	};
	
	auto Lca = [&](int t, int a, int b){
		if(is(t, a, b)) return a;
		if(is(t, b, a)) return b;
		for(int j=19;~j;j--){
			if(!is(t, par[t][a][j], b)) a = par[t][a][j];
		}
		return par[t][a][0];
	};
	
	sort(p.begin(), p.end(), [&](int a, int b){
		return tin[1][a] < tin[1][b];
	});
	
	for(int i=1;i<k;i++){
		cout<<"? "<<p[i-1]<<" "<<p[i]<<endl;
	}
	cout<<"! "<<endl;
	
	for(int i=1;i<k;i++){
		int dc, dd, da, db; cin >> dc >> dd >> da >> db;
		int lca = Lca(1, p[i-1], p[i]);
		d[1][lca] = d[1][p[i-1]] - da;
		d[1][p[i]] = d[1][lca] + db;
		d[0][p[i]] = d[0][p[i-1]] - dc + dd;
	}
	
	vector<ar<int, 2>> Q;
	for(int i=0;i<T;i++){
		int a, b; cin >> a >> b;
		Q.push_back({a, b});
	}
	
	for(auto [a, b] : Q){
		for(int c=0;c<2;c++){
			int lca = Lca(c, a, b);
			cout<<d[c][a] + d[c][b] - d[c][lca] * 2<<" ";
		}
		cout<<endl;
	}
}

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 19 / 19
• Subtask 4: 22 / 22
• Subtask 5: 24 / 24