Source code
#include <iostream>
#include<vector>
#include<string>
#include<math.h>
#include<set>
#include<map>
#include<stack>
#include<queue>
#include<iterator>
#include<algorithm>
/* ==================================================
| |
| Author: *** S. M. Sabiul Hajjaj Sabit *** |
| Last Edit: May,14,2019 |
================================================== */
///***global declaration***///
#define all(arr) arr.begin(),arr.end()
#define pb push_back
#define lb lower_bound
#define up upper_bound
#define sz(x) x.size()
#define min3(a,b,c) min(min(a,b),c)
#define max3(a,b,c) max(max(a,b),c)
using namespace std;
int i,j,n,m,sum=0,ans=0;
template <typename T>long long int power(T a, T b)
{
long long int pow=1;
for(int i=0; i<b; i++)
pow *= a;
return pow;
}
///*********Write Code From Here*********///
int main()
{
cin>>n;
int t=n;
for(int i=2; i<=n; i++)
{
for(int j=1; j<=i; j++)
{
if(t*j>n && t/j<n && t%j==0)
{
cout<<t<<" "<<j<<endl;
return 0;
}
}
t--;
}
cout<<-1<<endl;
}
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