#include<iostream>
using namespace std;

float F(float x) {
    if(x <= 5) return x*x + 5;
    if(x > 5 && x < 20) return 0;
    if(x >= 20) return 1;

    return 0;
}

void F(float x, float y) {
    cout << x << '\t' << y << endl;
}

int main() {
    int a, b, h;

    cout << "[a; b] = ";
    cin >> a >> b;

    cout << "h = ";
    cin >> h;

    cout << "x" << '\t' << "f(x)" << endl;

    for(int i = a; i <= b; i+=h) {
        F(i, F(i));
    }

    return 0;
}