#include <bits/stdc++.h>
#define ll long long
using namespace std;
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(abs(a-b)==1)
{
if(a>b)
{
if(check(b+3))
if(check(a+2))
{
cout<<2<<'\n';
cout<<a<<' '<<a+2<<' '<<b;
return 0;
}
if(a>4)
if(check(b-2))
if(check(a-3))
{
cout<<2<<'\n';
cout<<a<<' '<<a-3<<' '<<b;
return 0;
}
}
else
{
if(check(a+3))
if(check(b+2))
{
cout<<2<<'\n';
cout<<a<<' '<<b+2<<' '<<b;
return 0;
}
if(b>4)
if(check(a-2))
if(check(b-3))
{
cout<<2<<'\n';
cout<<a<<' '<<b-3<<' '<<b;
return 0;
}
}
cout<<-1;
return 0;
}
if(a==2)
{
if(check(b+2))
{
cout<<3<<'\n';
cout<<a<<' '<<b+2<<' '<<b;
return 0;
}
else
if(check(b-2) and (b-2)>1)
{
cout<<3<<'\n';
cout<<a<<' '<<b-2<<' '<<b;
return 0;
}
else
{
cout<<-1;
return 0;
}
}
if(b==2)
{
if(check(a+2))
{
cout<<3<<'\n';
cout<<a<<' '<<a+2<<' '<<b;
return 0;
}
else
if(check(a-2) and (a-2)>1)
{
cout<<3<<'\n';
cout<<a<<' '<<a-2<<' '<<b;
}
else
{
cout<<-1;
return 0;
}
}
ll mn=min(a,b),mx=max(a,b);
if(abs(a-b)==4)
if(check(mn+2) and check(mx-2))
{
cout<<3<<'\n';
cout<<a<<' '<<mn+2<<' '<<b;
return 0;
}
cout<<-1;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
204 KB |
Output is correct |
4 |
Correct |
1 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
1 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |