19 alg

//19 алгоритм
/*
8
1 -3 5.3 3.8 -2.8 8 0 4
7
-3.6 1 -500 8 2 -.7 8
*/
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <numeric>
using namespace std;

bool prost(int a){
    if (a==1) return 0;
    else {
    if (a!=2)
        for (int i=2; i<sqrt(a)+1; i++){
            if (!(a%i)) return 0;
        }
    return 1;}
}

int main()
{
    double c;
    int n;
    cin>>n;
    vector <double> x;
    for (int i=0; i<n; i++){
        cin>>c;
        x.push_back(c);
    }
    int m;
    cin>>m;
    vector <double> y;
    for (int i=0; i<m; i++){
        cin>>c;
        y.push_back(c);
    }
    vector <double> z(n+m);
    int
    it = (copy_if (x.begin(), x.end(), z.begin(),
             [](double a){return !(a<0);}) - z.begin());
    it = (copy_if (y.begin(), y.end(), z.begin()+it,
             [](double a){return !(a<0);}) - z.begin());
    z.resize(it);
    int it1 = (find_if(z.begin(),z.end(),prost) - z.begin());
    int it2 = (find_if(z.rbegin(),z.rend(),prost) - z.rbegin());
    it2 = z.size()-(it2+1);
    for (int i=0; i<z.size(); i++){
        if (i==it1||i==it2){
            cout<<"["<<z[i]<<"]"<<' ';
        }
        else cout<<z[i]<<' ';

    }
    cout<<endl<<"Index first : "<<it1<<endl;
    cout<<"Index last : "<<it2<<endl;
    if (fabs(it1-it2)<2||it1==z.size()) cout<<"NO";
    else {
        double sum = accumulate(z.begin()+(it1+1), z.begin()+it2, 0.0);
        cout<<"Chisel summiruem : "<<it2-(it1+1)<<endl;
        cout<<"Summa = "<<sum<<endl;
        sum/=(it2-(it1+1));
        cout<<"Srednee arifmeticheskoe = "<<sum;
    }
    return 0;
}