Submission #909079

#	Time	Username	Problem	Language	Result	Execution time	Memory
909079		pavement	Coreputer (IOI23_coreputer)	C++17	90 / 100	1 ms	596 KiB

coreputer

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

#define pb push_back

vector<int> malfunctioning_cores(int N) {
	vector<int> mal(N);
	int lo = 0, hi = N - 1, ans = -1, ret = -1;
	while (lo <= hi) {
		int mid = (lo + hi) / 2;
		vector<int> qu_vec;
		for (int i = 0; i <= mid; i++) {
			qu_vec.pb(i);
		}
		int tmp = run_diagnostic(qu_vec);
		if (tmp >= 0) {
			ans = mid;
			ret = tmp;
			hi = mid - 1;
		} else {
			lo = mid + 1;
		}
	}
	assert(ans != -1);
	vector<int> qu_vec;
	for (int i = 0; i <= ans; i++) {
		qu_vec.pb(i);
	}
	for (int i = 0; i < ans; i++) {
		qu_vec.erase(find(qu_vec.begin(), qu_vec.end(), i));
		if (run_diagnostic(qu_vec) == -1) {
			mal[i] = 1;
		}
		qu_vec.pb(i);
	}
	mal[ans] = 1;
	if (ans == N - 1) {
		return mal;
	}
	qu_vec.erase(find(qu_vec.begin(), qu_vec.end(), ans));
	for (int i = ans + 1; i + 1 < N; i++) {
		qu_vec.pb(i);
		if (run_diagnostic(qu_vec) >= 0) {
			mal[i] = 1;
		}
		qu_vec.pop_back();
	}
	int parity = count(mal.begin(), mal.end(), 1) % 2;
	mal.back() = (parity != ret);
	return mal;
}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 30 / 40