Submission #486019

#	Time	Username	Problem	Language	Result	Execution time	Memory
486019		tato	Lutrija (COCI19_lutrija)	C++14	70 / 70	153 ms	288 KiB

lutrija

#include <bits/stdc++.h>
#define ll long long
using namespace std;
ll m=1e15;
bool check(ll a)
{
	ll x=sqrt(a);
	
	for(ll k=2; k<=x; k++)
		if(a%k==0)
			return false;
			
	return true;
	
	
	
}

int main()
{
	ll  a,b;
	
	cin>>a>>b;
		if(check(a-2) and check(b-2) and a>3 and b>3)
			{
				cout<<3<<'\n';
				cout<<a<<' '<<2<<' '<<b;
				return 0;
			}
			if(abs(a-b)==2)
		{
			cout<<2<<'\n';
			cout<<a<<' '<<b;
			return 0;
		}
	
		
	
	if(a==2)
		{
			if(check(b+2))
				{
					cout<<3<<'\n';
					cout<<a<<' '<<b+2<<' '<<b;
					return 0;
				}
			
			if(b>6 and check(b-2) and check(b-4))
				{
					cout<<3<<'\n';
					cout<<a<<' '<<b-2<<' '<<b;
					return 0;
				}
	}
	if(b==2)
		{
		
		if(check(a+2))
			{
			cout<<3<<'\n';
			cout<<a<<' '<<a+2<<' '<<b;
			return 0;
			}	
			
			if(a>6 and check(a-2) and check(a-4))
				{
					cout<<3<<'\n';
					cout<<a<<' '<<a-2<<' '<<b;
					return 0;
				}			
		}
	ll mn=min(a,b),mx=max(a,b);
	
	if(check(a+2))
		if(check(b+2))
		{
			cout<<5<<'\n';
			cout<<a<<' '<<a+2<<' '<<2<<' '<<b+2<<' '<<b;
			return 0;
		}
		else
			{
				if(b>6 and check(b-2) and  check(b-4))
					{
						cout<<5<<'\n';
						cout<<a<<' '<<a+2<<' '<<2<<' '<<b-2<<' '<<b;
						return 0;
					}
				
			}
	else
		if(check(b+2))	
			{
				if(a>6 and check(a-2) and check(a-4))
					{
						cout<<5<<' ';
						cout<<a<<' '<<a-2<<' '<<2<<' '<<b+2<<' '<<b;
						return 0;
					}
			}
		
	

	
cout<<-1;


	return 0;
}

Compilation message (stderr)

lutrija.cpp: In function 'int main()':
lutrija.cpp:72:5: warning: unused variable 'mn' [-Wunused-variable]
   72 |  ll mn=min(a,b),mx=max(a,b);
      |     ^~
lutrija.cpp:72:17: warning: unused variable 'mx' [-Wunused-variable]
   72 |  ll mn=min(a,b),mx=max(a,b);
      |                 ^~

• 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