Submission #596527

#	Time	Username	Problem	Language	Result	Execution time	Memory
596527		Hussein3600	Lutrija (COCI19_lutrija)	C++14	0 / 70	9 ms	1568 KiB

lutrija

#include<bits/stdc++.h>
using namespace std ;
typedef long long ll ;
const int N=1e6 ;
vector<bool>vis(N+9) ;
vector<ll>p ;
vector<pair<ll,ll> >dif;
ll last=2;
int main()
{
    for(int i=2;i<=N;i++)
    {
        if(!vis[i])
        {
            for(int j=i;j<=N;j+=i)
            {
                vis[j]=true;
            }
            p.push_back(i) ;
        }
    }
    //cout<<p.size()<<endl;
    ll a , b ;
    cin >> a >> b ;
    if(abs(a-b)==2)
    {
        cout<<2<<endl<<a<<" "<<b<<endl;
    }
    else{
       bool ok=true;
       for(int i=0;i<p.size();i++)
       {
           if((a+b)%p[i]==0&&p[i]!=a+b)ok=false ;
       }
       if(ok)cout<<3<<endl<<a<<" "<<a+b<<" "<<b<<endl;
       else cout<<-1<<endl;
    }
}

Compilation message (stderr)

lutrija.cpp: In function 'int main()':
lutrija.cpp:31:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |        for(int i=0;i<p.size();i++)
      |                    ~^~~~~~~~~

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