# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
1257365 | knhatdev | Drvca (COCI19_drvca) | C++20 | 28 ms | 3136 KiB |
#include<bits/stdc++.h>
#define int long long
#define ii pair<int,int>
#define fi first
#define se second
#define task "noel"
using namespace std;
const int N = 1e6 + 5, mod = 1e9 + 7;
int n, a[N];
void check1()
{
int d = a[2] - a[1];
vector<int> v, v2;
v.push_back(a[1]);
for(int i = 2; i <= n; i++)
{
if(a[i] - v.back() == d)
{
v.push_back(a[i]);
}
else
{
v2.push_back(a[i]);
}
}
if(v2.size() == 0)
{
cout << v.size() - 1 << '\n';
for(int i = 0; i < v.size() - 1; i++)
cout << v[i] << ' ';
cout << '\n';
cout << 1 << '\n';
cout << v.back();
exit(0);
}
if(v2.size() >= 2)
{
for(int i = 1; i < v2.size(); i++)
if(v2[i] - v2[i - 1] != v2[1] - v2[0]) return;
}
cout << v.size() << '\n';
for(int x : v) cout << x << ' ';
cout << '\n' << v2.size() << '\n';
for(int x : v2) cout << x << ' ';
exit(0);
}
void check2()
{
int d = a[3] - a[1];
vector<int> v, v2;
v.push_back(a[1]);
for(int i = 2; i <= n; i++)
{
if(a[i] - v.back() == d)
{
v.push_back(a[i]);
}
else
{
v2.push_back(a[i]);
}
}
if(v2.size() == 0)
{
cout << v.size() - 1 << '\n';
for(int i = 0; i < v.size() - 1; i++)
cout << v[i] << ' ';
cout << '\n';
cout << 1 << '\n';
cout << v.back();
exit(0);
}
if(v2.size() >= 2)
{
for(int i = 1; i < v2.size(); i++)
if(v2[i] - v2[i - 1] != v2[1] - v2[0]) return;
}
cout << v.size() << '\n';
for(int x : v) cout << x << ' ';
cout << '\n' << v2.size() << '\n';
for(int x : v2) cout << x << ' ';
exit(0);
}
main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
if(fopen(task ".inp", "r")){
freopen(task ".inp", "r", stdin);
freopen(task ".out", "w", stdout);
}
cin >> n;
for(int i = 1; i <= n; i++)
cin >> a[i];
sort(a + 1, a + 1 + n);
if(n == 2)
{
cout << 1 << '\n' << a[1] << '\n' << 1 << '\n' << a[2];
exit(0);
}
if(n <= 4)
{
cout << 2 << '\n';
for(int i = 1; i <= 2; i++)
cout << a[i] << ' ';
cout << '\n';
cout << n - 2 << '\n';
for(int i = 3; i <= n; i++)
cout << a[i] << ' ';
exit(0);
}
check1();
check2();
cout << -1 << '\n';
}
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