Submission #838869

#	Time	Username	Problem	Language	Result	Execution time	Memory
838869		pavement	Minerals (JOI19_minerals)	C++17	6 / 100	15 ms	1232 KiB

minerals

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

#define pb push_back
#define mp make_pair

void Solve(int N) {
	vector<int> uniq, others;
	for (int i = 0, prv = 0; i < 2 * N; i++) {
		if (Query(i + 1) > prv) {
			uniq.pb(i);
			prv++;
		} else {
			others.pb(i);
		}
	}
	for (int i = 0; i < 2 * N; i++) {
		Query(i + 1);
	}
	vector<int> lo(2 * N, 0), hi(2 * N, N - 1), mid(2 * N), ans(2 * N, -1);
	int cur_l = -1, cur_r = -1;
	for (int rep = 0; rep < 20; rep++) {
		vector<bool> can(2 * N, 0);
		for (int i : others) {
			mid[i] = (lo[i] + hi[i]) / 2;
			// insert [lo[i], mid[i]] from uniq
		}
		sort(others.begin(), others.end(), [&](const auto &lhs, const auto &rhs) {
			return mp(lo[lhs], mid[rhs]) < mp(lo[rhs], mid[rhs]);
		});
		for (int i : others) {
			if (cur_l == -1 || cur_l > lo[i]) {
				if (cur_l != -1) {
					for (int j = cur_l; j <= cur_r; j++) {
						Query(uniq[j] + 1);
					}
				}
				for (int j = lo[i]; j <= mid[i]; j++) {
					Query(uniq[j] + 1);
				}
				cur_l = lo[i];
				cur_r = mid[i];
			} else {
				if (cur_r > mid[i]) {
					for (int j = cur_r; j > mid[i]; j--) {
						Query(uniq[j] + 1);
					}
				} else {
					for (int j = cur_r + 1; j <= mid[i]; j++) {
						Query(uniq[j] + 1);
					}
				}
				cur_r = mid[i];
				assert(cur_l <= lo[i]);
				for (int j = cur_l; j < lo[i]; j++) {
					Query(uniq[j] + 1);
				}
				cur_l = lo[i];
			}
			int ret_1 = Query(i + 1);
			int ret_2 = Query(i + 1);
			if (ret_1 == ret_2) {
				can[i] = 1;
			}
		}
		for (int i : others) {
			if (can[i]) {
				ans[i] = mid[i];
				hi[i] = mid[i] - 1;
			} else {
				lo[i] = mid[i] + 1;
			}
		}
	}
	for (int i : others) {
		Answer(i + 1, uniq[ans[i]] + 1);
	}
}

• Subtask 1: 6 / 6
• Subtask 2: 0 / 25
• Subtask 3: 0 / 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