exp #2141

#include <iostream>
#include <fstream>

using namespace std;
ifstream f("exp.in");
ofstream g("exp.out");
bool ciur[30001];
short h=0, nrp[3500],pw[3500];
void eratostene()
{
    int i, j;
    ciur[0]=ciur[1]=1;
    for (i=2; i<=173; ++i)
    {
        if(!ciur[i])
        {
            for (j=i*i; j<=30001; j+=i)
               ciur[j]=1;
        }
    }
    for(i=1; i<=30000; ++i)
        if(!ciur[i])
        nrp[++h]=i;
}
void factp(int a)
{
    int f, p, k=0;
    f=nrp[++k];
    while (a>1)
    {
        p=0;
        while (a%f==0)
            a/=f, ++p;
        pw[k]+=p;
        f=nrp[++k];
    }
}
int main()
{
    eratostene();
    cout<<nrp[h];
    short ord, n; int x;
    f>>ord>>n;
    short i;
    for (i=1; i<=n; ++i)
    {
        f>>x;
        factp(x);
    }

    for (i=1; i<=h; ++i)
    {
        if(pw[i]%ord)
        {
            g<<0;
            return 0;
        }
        else
            pw[i]/=ord;
    }
    g<<1<<'\n';
    for (i=1; i<=h; ++i)
        if(pw[i])
            g<<nrp[i]<<" "<<pw[i]<<'\n';
}