Submission #634139

#	Time	Username	Problem	Language	Result	Execution time	Memory
634139		epicci23	Lutrija (COCI19_lutrija)	C++17	70 / 70	150 ms	300 KiB

lutrija

#include "bits/stdc++.h"
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define endl "\n" 
#define MOD 1000000007
#define int long long
#define double long double
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define what_is(x) cerr << #x << " is " << x << endl;
const int N=200005;
const long long INF = LLONG_MAX;
const int INF2=(int)1e18;
const int LOG=20;
typedef pair<int,int> pii;
typedef tuple<int,int,int> tp;
typedef priority_queue<pii,vector<pii>,greater<pii>> min_pq;
typedef priority_queue<pii> max_pq;
typedef long long ll;
//sunlari dusun//
/*
 * kodu kisaltcak  fonksiyon
 * cevaba binary search ya da normal bs
 * segment tree / sparse table
 * stack
 * teklik ciftlik
 * precomputation
 * EN ONEMLISI OVERKILLEME
 * edge case dusunr
 * constraintlere bak
 * indisleri kontrol et 
 * dp
 * greedy
 * sorting
 * dfs bfs
 * sieve
*/

bool p(int a)
{
    if(a<=1) return 0;
    for(int i=2;i*i<=a;i++) if(a%i==0) return 0;
    return 1;
}

void solve()
{
    int a,b;
    cin >> a >>b;
    if(p( abs(a-b) ) )
    {
        cout << 2 << "\n" << a << " " << b << endl;
        return;
    }
    int ok1=0,ok2=0;
    if(a==2) ok1=1;
    else if(p(a-2)) ok1=2;
    else if(p(a+2)) ok1=3;
    if(b==2) ok2=1;
    else if(p(b-2)) ok2=2;
    else if(p(b+2)) ok2=3;
    if(ok1 && ok2)
    {
        int cnt=2;
        if(ok1==2) cnt+=1;
        if(ok1==3) cnt+=2;
        if(ok2==2) cnt+=1;
        if(ok2==3) cnt+=2;
        cnt++;
        cout << cnt << endl;
        if(ok1==2) cout << a << " " <<  2 << " ";
        else if(ok1==3) cout << a << " " << a+2 <<" " << 2 << " ";
        else cout << 2 << " ";
        cout << 5 << " ";
        if(ok2==2) cout << 2 << " " << b;
        else if(ok2==3) cout << 2 <<" " << b+2 << " " << b;
        else cout << b << endl;
    }
    else cout << -1 << endl;
}

int32_t main(){
   

     cin.tie(0); ios::sync_with_stdio(0);
     cout << fixed <<  setprecision(15);
 int t=1;//cin>> t;
 
 while(t--) solve();
 
 return 0;
}

• 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