Submission #83453

#	Time	Username	Problem	Language	Result	Execution time	Memory
83453		thiago4532	Pictionary (COCI18_pictionary)	C++17	56 / 140	1572 ms	34044 KiB

pictionary

#include <bits/stdc++.h>
#define div divisores

using namespace std;
const int maxn = 1e5 + 10;
int pai[maxn], peso[maxn], ans[maxn];

int n, m, q;

int gcd(int a, int b){
	return b ? gcd(b, a%b) : a;
}

struct UnionFind{
	vector<int> pai, peso;
	int n;

	UnionFind(int n=0): n(n){
		init(n);
	}

	void init(int n){
		pai.resize(n+1);
		peso.resize(n+1);

		for(int i=1;i<=n;i++)
			pai[i] = i, peso[i] = 0;
	}

	int find(int u){
		return (pai[u] == u ? u : pai[u] = find(pai[u]));
	}

	inline void join(int a, int b){
		a = find(a);
		b = find(b);

		if(peso[a] == peso[b]) peso[b]++;
		else if(peso[a] > peso[b]) swap(a, b);

		pai[a] = b;
	}
};

struct query{
	int l, r, id;
};
vector<query> qq;

void solve(vector<query>& queries, UnionFind u, int ini, int fim){
	int meio = (ini + fim) >> 1;
	UnionFind u2 = u;
	for(int dia=ini;dia<=meio;dia++){
		int k = m - dia + 1;
		for(int i=2;i*k<=n;i++){
	//cout << "INICIO\n";
			// /cout << k << endl;
		//cout << "FIM\n";
			if(u.find(k) != u.find(i*k)) u.join(k, i*k);
		}
	}
	

	vector<query> l, r;
	for(auto& q : queries){
		if(u.find(q.l) == u.find(q.r)) ans[q.id] = min(ans[q.id], fim), l.push_back(q);
		else r.push_back(q);
	}
	if(ini == fim) return;

	solve(l, u2, ini, meio);
	solve(r, u, meio+1, fim);
}	

int main(){
	//ios::sync_with_stdio(false), cin.tie(0);
	memset(ans, 0x3f, sizeof ans);
	cin >> n >> m >> q;

	for(int i=0;i<q;i++){
		int a, b;
		cin >> a >> b;
		qq.push_back({a, b, i});
	}

	// for(int k=m;k>=1;k--){
	// 	for(int i=2;i*k<=n;i++){
	// 		if(find(k) != find(i*k)) join(k, i*k);
	// 	}

	// 	for(int l=1;l<=q;l++){
	// 		if(marcado[l]) continue;
	// 		if(find(qq[l].first) == find(qq[l].second)) ans[l] = m - k + 1, marcado[l] = true;
	// 	}
	// }
	solve(qq, UnionFind{n}, 1, m);
	for(int i=0;i<q;i++)
		cout << ans[i] << "\n";
	return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14