Submission #321456

#	Time	Username	Problem	Language	Result	Execution time	Memory
321456		ronnith	Lutrija (COCI19_lutrija)	C++14	70 / 70	195 ms	640 KiB

lutrija

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#warning Check Integer OverFlow
#define ll long long
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define FORd(i,a,b) for(int i=a;i>=b;i--)
#define trav(a,b) for(auto a:b)
#define sz(a) a.size()
#define maxs(a,b) if(b>a)a=b
#define mins(a,b) if(b<a)a=b
#ifdef LOCAL 
	#define dbg(x) cerr<<"["<<#x<<":"<<x<<"] "
	#define dbg2(a,b) dbg(a);dbg(b)
	#define dbg3(a,b,c) dbg2(a,b);dbg(c)
	#define dln cerr << ln
#else
	#define dbg(x) 0
	#define dbg2(a,b) 0
	#define dbg3(a,b,c) 0
	#define dln 0
#endif
#define gcd(a,b) __gcd(a,b)
#define lcm(a,b) (((a)/(__gcd(a,b))) * b)
#define print(arr) for(auto it = arr.begin();it < arr.end();it ++){cout << *it << " ";}cout << ln;
#define all(a) (a).begin(), (a).end()
#define vi vector<int>
#define v vector
#define p pair
#define pii p<int,int>
#define pb push_back
#define mk make_pair
#define f first
#define s second
#define ln "\n"
typedef long double ld;
using namespace std;
using namespace __gnu_pbds;
ll modF=1e9+7;

template<class T> using iset = tree<
T,
null_type,
less<T>,
rb_tree_tag,
tree_order_statistics_node_update>;

/*INPUT
13 11

37 11

2 17

*/

bool isPrime(ll pr)
{
	if(pr <= 1)return false;
	for(ll i = 2;i * i <= pr;i ++)
	{
		if(pr % i == 0)return false;
	}
	return true;
}

ll twin(ll a)
{
	if(isPrime(a + 2))return a + 2;
	else if(isPrime(a - 2)) return a - 2;
	else return -1;
}

void solve(){
	ll a,b;
	cin >> a >> b;
	ll ta = twin(a);
	ll tb = twin(b);
	if(ta != -1 and b == 2)
	{
		int len = 0;
		if(a > ta)len = 2;
		else len = 3;
		cout << len << '\n';
		if(a > ta)
		{
			cout << a << " " << 2 << '\n';
		}
		else
		{
			cout << a << " " << ta << " 2\n";
		}
		return;
	}
	else if(a == 2 and tb != -1)
	{
		int len = 0;
		if(b > tb)len = 2;
		else len = 3;
		cout << len << '\n';
		if(b > tb)
		{
			cout << 2 << " " << b << '\n';
		}
		else
		{
			cout << 2 << " " << tb << " " << b << '\n';
		}
		return;
	}
	else if(ta == -1 or tb == -1)
	{
		cout << -1 << '\n';
		return;
	}

	// dbg2(ta,tb);

	int len = 0;
	if(a > ta)len += 2;
	else len += 3;
	if(b > tb) len += 1;
	else len += 2;
	cout << len << '\n';
	if(a > ta)
	{
		cout << a << " 2 ";
	}
	else
	{
		cout << a << " " << ta << " 2 ";
	}
	if(b > tb)
	{
		cout << b << '\n';
	}
	else
	{
		cout << tb << " " << b << '\n';
	}
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int t = 1;
	// cin >> t;
	while(t --){
		solve();
	}
}

Compilation message (stderr)

lutrija.cpp:4:2: warning: #warning Check Integer OverFlow [-Wcpp]
    4 | #warning Check Integer OverFlow
      |  ^~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 7 / 7
• Subtask 4: 7 / 7
• Subtask 5: 7 / 7
• Subtask 6: 7 / 7
• Subtask 7: 7 / 7
• Subtask 8: 7 / 7
• Subtask 9: 7 / 7
• Subtask 10: 7 / 7