Laba 11, 3

import java.util.Scanner;

public class Task3 {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("x: ");
        int x = scanner.nextInt();

        int f = 0;
        if (x < 0) {
            f = 4 * x - 1;
        } else if (x > 0) {
            f = 25 * x + 10;
        } else if (x == 0) {
            f = 0;
        }

        System.out.println("F " + f);
        scanner.close();
    }
}