Submission #254539

#	Time	Username	Problem	Language	Result	Execution time	Memory
254539		MrRobot_28	Drvca (COCI19_drvca)	C++17	30 / 110	117 ms	3184 KiB

drvca

#include <bits/stdc++.h>
                  
using namespace std;
#define int long long
int n;
vector <bool> used;
vector <int> a;
int lower(int l, int r, int val)
{
	r++;
	int r1 = r;
	while(r - l > 1)
	{
		int midd = (r + l) / 2;
		if(a[midd] < val || a[midd] == val && used[midd])
		{
			l = midd;
		} 
		else
		{
			r = midd;
		}
	}
	if(r1 != r && a[r] == val)
	{
		return r;
	}
	if(a[l] == val)
	{
		return l;
	}
	return r;
}
void funct1()
{
	int diff = a[1] - a[0];
	vector <int> vec1;
	used[0] = 1;
	vec1.push_back(a[0]);
	int it1 = 1;
	for(int j = 1; j < n; j++)
	{
		if(it1 == n)
		{
			break;
		}
		int it = lower(it1, n - 1, vec1.back() + diff);
		if(it != a.size() && a[it] == vec1.back() + diff)
		{
			vec1.push_back(a[it]);
			used[it] = 1;
			it1 = it + 1;
		}
		else
		{
			break;
		}
	}
	vector <int> vec2;
	for(int j = 0; j < n; j++)
	{
		if(!used[j])
		{
			vec2.push_back(a[j]);
		}
	}
	bool flag = true;
	for(int j = 1; j + 1 < vec2.size(); j++)
	{
		if(vec2[j] - vec2[j - 1] != vec2[j + 1] - vec2[j])
		{
			flag = false;
		}
	}
	if(flag && vec2.size() > 0)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
	for(int i = n - 1; i >= 0; i--)
	{
		if(used[i])
		{
			used[i] = 0;
			break;
		}
	}
	vec1.pop_back();
	if(vec1.size() == 0)
	{
		return;
	}
	vec2.clear();
	for(int i = 0; i < n; i++)
	{
		if(!used[i])
		{
			vec2.push_back(a[i]);
		}
	}
	flag = true;
	for(int j = 1; j + 1 < vec2.size(); j++)
	{
		if(vec2[j] - vec2[j - 1] != vec2[j + 1] - vec2[j])
		{
			flag = false;
		}
	}
	if(flag)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
	if(vec1.size() == 1)
	{
		return;
	}
	vec1.pop_back();
	vec2.clear();
	for(int i = n - 1; i >= 0; i--)
	{
		if(used[i])
		{
			used[i] = 0;
			break;
		}
	}
	diff = a[n - 1] - a[n - 2];
	vec2.push_back(a[n - 1]);
	it1 = n - 1;
	while(vec1.size() + vec2.size() < n)
	{
		int j = lower(0, it1 - 1, vec2.back() - diff);
		if(j == it1 || a[j] != vec2.back() - diff)
		{
			break;
		}
		if(used[j])
		{
			if(vec1.back() != a[j])
			{
				break;
			}
			vec1.pop_back();
		}
		it1 = j;
		vec2.push_back(a[j]);
	}
	sort(vec2.begin(), vec2.end());
	if(vec1.size() + vec2.size() == n && vec1.size() != 0)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
}
void funct2()
{
	if(n < 3)
	{
		return;
	}
	int diff = a[2] - a[0];
	vector <int> vec1;
	used[0] = 1;
	vec1.push_back(a[0]);
	int it1 = 1;
	for(int j = 1; j < n; j++)
	{
		if(it1 == n)
		{
			break;
		}
		int it = lower(it1, a.size() - 1, vec1.back() + diff);
		if(it != a.size() && a[it] == vec1.back() + diff)
		{
			vec1.push_back(a[it]);
			used[it] = 1;
			it1 = it + 1;
		}
		else
		{
			break;
		}
	}
	vector <int> vec2;
	for(int i = 0; i < n; i++)
	{
		if(!used[i])
		{
			vec2.push_back(a[i]);
		}
	}
	bool flag = true;
	for(int j = 1; j + 1 < vec2.size(); j++)
	{
		if(vec2[j] - vec2[j - 1] != vec2[j + 1] - vec2[j])
		{
			flag = false;
		}
	}
	if(flag && vec2.size() > 0)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
	for(int i = n - 1; i >= 0; i--)
	{
		if(used[i])
		{
			used[i] = 0;
			break;
		}
	}
	vec1.pop_back();
	if(vec1.size() == 0)
	{
		return;
	}
	vec2.clear();
	for(int i = 0; i < n; i++)
	{
		if(!used[i])
		{
			vec2.push_back(a[i]);
		}
	}
	flag = true;
	for(int j = 1; j + 1 < vec2.size(); j++)
	{
		if(vec2[j] - vec2[j - 1] != vec2[j + 1] - vec2[j])
		{
			flag = false;
		}
	}
	if(flag)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
	if(vec1.size() == 1)
	{
		return;
	}
	vec1.pop_back();
	vec2.clear();
	for(int i = n - 1; i >= 0; i--)
	{
		if(used[i])
		{
			used[i] = 0;
			break;
		}
	}
	diff = a[n - 1] - a[n - 2];
	vec2.push_back(a[n - 1]);
	it1 = n - 1;
	while(vec1.size() + vec2.size() < n)
	{
		int j = lower(0, it1 - 1, vec2.back() - diff);
		if(j == it1 || a[j] != vec2.back() - diff)
		{
			break;
		}
		if(used[j])
		{
			if(vec1.back() != a[j])
			{
				break;
			}
			vec1.pop_back();
		}
		it1 = j;
		vec2.push_back(a[j]);
	}
	sort(vec2.begin(), vec2.end());
	if(vec1.size() + vec2.size() == n && vec1.size() != 0)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
}
void funct3()
{
	if(n < 3)
	{
		return;
	}
	int diff = a[2] - a[1];
	vector <int> vec1;
	used[0] = 1;
	vec1.push_back(a[1]);
	int it1 = 2;
	for(int j = 1; j < n; j++)
	{
		if(it1 == n)
		{
			break;
		}
		int it = lower(it1, a.size() - 1, vec1.back() + diff);
		if(it != a.size() && a[it] == vec1.back() + diff)
		{
			vec1.push_back(a[it]);
			used[it] = 1;
			it1 = it + 1;
		}
		else
		{
			return;
		}
	}
	vector <int> vec2;
	for(int j = 0; j < n; j++)
	{
		if(!used[j])
		{
			vec2.push_back(a[j]);
		}
	}
	bool flag = true;
	for(int j = 1; j + 1 < vec2.size(); j++)
	{
		if(vec2[j] - vec2[j - 1] != vec2[j + 1] - vec2[j])
		{
			flag = false;
		}
	}
	if(flag && vec2.size() > 0)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
	for(int i = n - 1; i >= 0; i--)
	{
		if(used[i])
		{
			used[i] = 0;
			break;
		}
	}
	vec1.pop_back();
	if(vec1.size() == 0)
	{
		return;
	}
	vec2.clear();
	for(int i = 0; i < n; i++)
	{
		if(!used[i])
		{
			vec2.push_back(a[i]);
		}
	}
	flag = true;
	for(int j = 1; j + 1 < vec2.size(); j++)
	{
		if(vec2[j] - vec2[j - 1] != vec2[j + 1] - vec2[j])
		{
			flag = false;
		}
	}
	if(flag)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
	if(vec1.size() == 1)
	{
		return;
	}
	vec1.pop_back();
	vec2.clear();
	for(int i = n - 1; i >= 0; i--)
	{
		if(used[i])
		{
			used[i] = 0;
			break;
		}
	}
	diff = a[n - 1] - a[n - 2];
	vec2.push_back(a[n - 1]);
	it1 = n - 1;
	while(vec1.size() + vec2.size() < n)
	{
		int j = lower(0, it1 - 1, vec2.back() - diff);
		if(j == it1 || a[j] != vec2.back() - diff)
		{
			break;
		}
		if(used[j])
		{
			if(vec1.back() != a[j])
			{
				break;
			}
			vec1.pop_back();
		}
		it1 = j;
		vec2.push_back(a[j]);
	}
	sort(vec2.begin(), vec2.end());
	if(vec1.size() + vec2.size() == n && vec1.size() != 0)
	{
		cout << vec1.size() << "\n";
		for(int i = 0; i < vec1.size(); i++)
		{
			cout << vec1[i] << " ";
		}
		cout << "\n";
		cout << vec2.size() << "\n";
		for(int i = 0; i < vec2.size(); i++)
		{
			cout << vec2[i] << " ";
		}
		exit(0);
	}
}
signed main(){
//	ios_base::sync_with_stdio(false);
//	cin.tie(NULL);
//	cout.tie(NULL);
	cin >> n;
	a.resize(n);
	used.resize(n);
	for(int i = 0; i < n; i++)
	{
		cin >> a[i];
	}
	sort(a.begin(), a.end());
	funct1();
	for(int i = 0; i < n; i++)
	{
		used[i] = 0;
	}
	funct2();
	for(int i = 0; i < n; i++)
	{
		used[i] = 0;
	}
	funct3();
	cout << -1;
	return 0;
}

Compilation message (stderr)

drvca.cpp: In function 'long long int lower(long long int, long long int, long long int)':
drvca.cpp:15:38: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(a[midd] < val || a[midd] == val && used[midd])
drvca.cpp: In function 'void funct1()':
drvca.cpp:48:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(it != a.size() && a[it] == vec1.back() + diff)
      ~~~^~~~~~~~~~~
drvca.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 1; j + 1 < vec2.size(); j++)
                 ~~~~~~^~~~~~~~~~~~~
drvca.cpp:78:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:84:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:112:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 1; j + 1 < vec2.size(); j++)
                 ~~~~~~^~~~~~~~~~~~~
drvca.cpp:122:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:128:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:151:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(vec1.size() + vec2.size() < n)
        ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
drvca.cpp:170:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(vec1.size() + vec2.size() == n && vec1.size() != 0)
     ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
drvca.cpp:173:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:179:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp: In function 'void funct2()':
drvca.cpp:204:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(it != a.size() && a[it] == vec1.back() + diff)
      ~~~^~~~~~~~~~~
drvca.cpp:224:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 1; j + 1 < vec2.size(); j++)
                 ~~~~~~^~~~~~~~~~~~~
drvca.cpp:234:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:240:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:268:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 1; j + 1 < vec2.size(); j++)
                 ~~~~~~^~~~~~~~~~~~~
drvca.cpp:278:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:284:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:307:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(vec1.size() + vec2.size() < n)
        ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
drvca.cpp:326:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(vec1.size() + vec2.size() == n && vec1.size() != 0)
     ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
drvca.cpp:329:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:335:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp: In function 'void funct3()':
drvca.cpp:360:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(it != a.size() && a[it] == vec1.back() + diff)
      ~~~^~~~~~~~~~~
drvca.cpp:380:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 1; j + 1 < vec2.size(); j++)
                 ~~~~~~^~~~~~~~~~~~~
drvca.cpp:390:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:396:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:424:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 1; j + 1 < vec2.size(); j++)
                 ~~~~~~^~~~~~~~~~~~~
drvca.cpp:434:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:440:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:463:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(vec1.size() + vec2.size() < n)
        ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
drvca.cpp:482:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(vec1.size() + vec2.size() == n && vec1.size() != 0)
     ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
drvca.cpp:485:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec1.size(); i++)
                  ~~^~~~~~~~~~~~~
drvca.cpp:491:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < vec2.size(); i++)
                  ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 30 / 30
• Subtask 4: 0 / 30