#include <iostream>

using namespace std;

double x, x_p, x_k, x_i, s;
int n, i;
double f (x){
    return x^2-x+10;
}
double F1 (x, x_p, x_k, n){
    for(i=0; i<=n; i++){
        s+=f(x_p+(i*(x_k-x_p)/n));
    }
    return s*(x_k-x_p)/n;
}
int main(){
cout<<"podaj x_p: ";
cin>>x_p;
cout<<"\npodaj x_k: ";
cin>>x_k;
cout<<"\npodaj n: ";
cin>>n;
cout<<"\npodaj x: ";
cin>>x;
F1(x, x_p, x_k, n);
}