Submission #912547

#	Time	Username	Problem	Language	Result	Execution time	Memory
912547		zyq181	Coreputer (IOI23_coreputer)	C++17	100 / 100	1 ms	616 KiB

coreputer

#include "coreputer.h"
#include <bits/stdc++.h>
using namespace std;
 
vector<int> malfunctioning_cores(int N){
	vector<int> mal;
	vector<int> v;
	for(int a=0; a<N; a++) v.push_back(0);
	int lo = 0;
	int hi = N-1;
	bool flag = 1;
	vector<int> q;
	int t;
	int numneed;
	while(lo < hi){
		q.clear();
		int m = (lo + hi)/2;
		for(int a=0; a<=m; a++){
			q.push_back(a);
		}
		t = run_diagnostic(q);
		if(t == 0) flag = 0;
		if(t == -1) lo = m + 1;
		else hi = m;
	}
	mal.push_back(lo);
	if(lo == 0){
		if(flag) {
			v[0] = 1;
			return v;
		}
		else{
			v[0] = 1;
			for(int a=1; a<=N-2; a++){
				q.clear();
				q.push_back(a);
				if(run_diagnostic(q) == 0){
					v[a] = 1;
					return v;
				}
			}
			v[N-1] = 1;
			return v;
		}
	}
	q.clear();
	for(int a=0; a<=lo; a++) q.push_back(a);
	for(int a=lo+1; a<=N-1; a++){
		q.pop_back();
		q.push_back(a);
		if(run_diagnostic(q) != -1){
			mal.push_back(a);
		}
	}
	if(flag) numneed = mal.size();
	else numneed = mal.size() - 1;
	q.clear();
	for(int a=0; a<numneed-1; a++){
		q.push_back(mal[a]);
	}
	for(int a=0; a<=lo-2; a++){
		q.push_back(a);
		if(run_diagnostic(q) != -1) mal.push_back(a);
		q.pop_back();
	}
	int k = mal.size();
	if((k%2) != flag) mal.push_back(lo - 1);
	for(auto it: mal) v[it] = 1;
	return v;
}

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