Submission #903968

#	Time	Username	Problem	Language	Result	Execution time	Memory
903968		Itamar	Coreputer (IOI23_coreputer)	C++17	50 / 100	1 ms	608 KiB

coreputer

#include "coreputer.h"
#include <vector>
using namespace std;
#define vi vector<int>
#include <algorithm>
std::vector<int> malfunctioning_cores(int N) {
	vi ans(N, -1);
	int l = 0, r = N-1;
	vi q;
	while (q.size()<4) {
		int mid = (l + r) / 2;
		vi v;
		for (int i = 0; i <= mid; i++)v.push_back(i);
		int a = run_diagnostic(v);
		q.push_back(a);
		if (a == 0) { l = mid, r = mid; }
		if (a == -1)l = mid+1;
		else r = mid;
	}
	int t = q.back();
	int g=-1;
	int tt=t;
	for (int i = 0; i < N; i++) {
		vi v; for (int j = 0; j <= l; j++)if (i != j && (g!=j || i<=l))v.push_back(j);
		int a;
		if (i > l) {
			v.push_back(i);
			a = run_diagnostic(v);
			ans[i] = (tt < a);
		}
		else {
			a = run_diagnostic(v);
			ans[i] = (t > a);
			if (ans[i] && t!=0) {
				g = i; tt = a;
			}
		}
	}
	return ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 40
• Subtask 3: 0 / 40