Submission #1227887

#	Time	Username	Problem	Language	Result	Execution time	Memory
1227887		loloka	Minerals (JOI19_minerals)	C++20	40 / 100	142 ms	10496 KiB

minerals

#include "minerals.h"
#include<bits/stdc++.h>
using namespace std;

mt19937 rng(time(0));

int kl;
void slv(vector<int> v1, vector<int> v2) {
	/*for(auto i : v1) cout << i << " ";
	cout << "\n";
	for(auto i : v2) cout << i << " ";
	cout << "\n" << "\n";*/
	if((int)v1.size() == 1) {
		Answer(v1[0], v2[0]);
		return;
	}
	int n = (int)v1.size();
	vector<int> l1, l2, r1, r2;
	for(int i = 0; i < n / 2; i++) l1.push_back(v1[i]);
	for(int i = n / 2; i < n; i++) r1.push_back(v1[i]);
	map<int, int> mp;
	shuffle(v2.begin(), v2.end(), rng);
	for(int i = 0; i < n; i++) {
		if(l2.size() == l1.size()) {
			r2.push_back(v2[i]);
			continue;
		}
		if(r2.size() == r1.size()) {
			l2.push_back(v2[i]);
			continue;
		}
		int k = Query(v2[i]); 
		//cout << k << " " << kl << " " << v2[i] << " f\n";
		if(k == kl) l2.push_back(v2[i]), mp[v2[i]] = 1;
		else r2.push_back(v2[i]), mp[v2[i]] = 2;
		kl = k;
	}
	int S1 = (int)l1.size();
	if(n / 2 > 1) {
		for(int i = S1 / 2; i < S1; i++) kl = Query(l1[i]);
		for(auto i : v2) if(mp[i] == 1) kl = Query(i);
	}
	slv(l1, l2);
	swap(r1, r2);
	if(n - n / 2 > 1) {
		int S = (int)r1.size();
		for(int i = 0; i < S / 2; i++) if(!mp[r1[i]]) kl = Query(r1[i]);
		for(int i = S / 2; i < S; i++) if(mp[r1[i]]) kl = Query(r1[i]);
	}
	slv(r1, r2);
}

void Solve(int n) {
	vector<int> v1, v2;
	map<int, int> mp;
	kl = 0;
	for(int i = 1; i <= 2 * n; i++) {
		if(kl == n) {
			v2.push_back(i);
			continue;
		}
		int k = Query(i);
		mp[i] = 1;
		if(k == kl) v2.push_back(i);
		else v1.push_back(i);
		kl = k;
	}
	for(int i = 0; i < n / 2; i++) if(!mp[v1[i]]) kl = Query(v1[i]);
	for(int i = n / 2; i < n; i++) if(mp[v1[i]]) kl = Query(v1[i]);
	for(auto i : v2) if(mp[i]) kl = Query(i);
	slv(v1, v2);
}

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 0 / 30
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 10