Submission #842624

#	Time	Username	Problem	Language	Result	Execution time	Memory
842624		WLZ	Coreputer (IOI23_coreputer)	C++17	100 / 100	1 ms	600 KiB

coreputer

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

std::vector<int> malfunctioning_cores(int N) {
	int lo = 0, hi = N - 1, last;
	while (lo < hi) {
		int mid = (lo + hi) / 2;
		vector<int> ask(mid + 1);
		iota(ask.begin(), ask.end(), 0);
		last = run_diagnostic(ask);
		if (last == -1) lo = mid + 1;
		else hi = mid;
	}
	vector<int> ans(N, 0);
	ans[lo] = 1;
	bool odd = true;
	int cnt = 1;
	for (int i = 0; i < N; i++) {
		if (i == lo) continue;
		if (N == 16 && (i == N - 1 || (lo == N - 1 && i == N - 2))) {
			if (cnt % 2 != odd) ans[i] = 1, cnt++;
			continue;
		}
		if (i > lo) {
			vector<int> ask = {i};
			for (int j = 0; j < lo; j++) ask.push_back(j);
			int tmp = run_diagnostic(ask);
			if (tmp == 0) odd = false;
			if (tmp != -1) ans[i] = 1, cnt++;
		} else {
			vector<int> ask = {};
			for (int j = 0; j <= lo; j++) if (j != i) ask.push_back(j);
			int tmp = run_diagnostic(ask);
			if (tmp == 0) odd = false;
			if (tmp == -1) ans[i] = 1, cnt++;
		}
	}
	return ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40