Submission #704290

#	Time	Username	Problem	Language	Result	Execution time	Memory
704290		chenyan	Lutrija (COCI19_lutrija)	C++17	7 / 70	1 ms	320 KiB

lutrija

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define pb emplace_back
#define N 200010
bool isp(int x){
	for(int i=2;i*i<=x;i++)
		if(x%i==0)return 0;
	return 1;
}
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int a,b,i,j;
	cin>>a>>b;
	if(isp(abs(a-b))){
		if(isp(abs(a-b))){
			cout<<2<<'\n'<<a<<' '<<b<<'\n';
		}
		else cout<<-1<<'\n';
	}
	else if(a==2||b==2){
		if(isp(max(a,b)+2)){
			cout<<3<<'\n'<<a<<' '<<max(a,b)+2<<' '<<b<<'\n';
		}
		else if(isp(max(a,b)-2)){
			cout<<3<<'\n'<<a<<' '<<max(a,b)-2<<' '<<b<<'\n';
		}
		else cout<<-1<<'\n';
	}
	else{
		if(isp(a-2)&&isp(b-2))cout<<3<<'\n'<<a<<' '<<2<<' '<<b<<'\n';
		else cout<<"-1\n";
	}
}

Compilation message (stderr)

lutrija.cpp: In function 'int main()':
lutrija.cpp:18:10: warning: unused variable 'i' [-Wunused-variable]
   18 |  int a,b,i,j;
      |          ^
lutrija.cpp:18:12: warning: unused variable 'j' [-Wunused-variable]
   18 |  int a,b,i,j;
      |            ^

• Subtask 1: 0 / 7
• Subtask 2: 7 / 7
• Subtask 3: 0 / 7
• Subtask 4: 0 / 7
• Subtask 5: 0 / 7
• Subtask 6: 0 / 7
• Subtask 7: 0 / 7
• Subtask 8: 0 / 7
• Subtask 9: 0 / 7
• Subtask 10: 0 / 7