Submission #205146

#	Time	Username	Problem	Language	Result	Execution time	Memory
205146		mraron	Lutrija (COCI19_lutrija)	C++14	0 / 70	165 ms	396 KiB

lutrija

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
bool ip(ll x) {
	for(ll i=2;i*i<=x;++i) {
		if(x%i==0) return false;
	}
	return true;
}
int main() {
	ll a,b;
	cin>>a>>b;
	bool rev=false;
	if(a>b) {
		swap(a,b);
		rev=true;
	}
	vector<ll> ans={-1};
	if(a==2) {
		if(ip(b-2)) {
			ans={a,b-2,b};
		}else if(ip(b+2)) {
			ans={a,b+2,b};
		}
	}else {
		vector<ll> ans2;
		for(ll i=a;i<=b;i+=2) {
			if(ip(i)) ans2.push_back(i); else break ;
		}
		if(ans2.back()==b) ans=ans2;
	}
	
	if(rev) reverse(ans.begin(), ans.end());
	if(ans.size()>1) cout<<ans.size()<<"\n";
	for(auto i:ans) cout<<i<<" ";
	cout<<"\n";
}

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