package pl.edu.uwm.wmii.kruczekkamil.laboratorium01;
import java.util.Scanner;
import java.lang.String;
import java.util.Random;


public class Main {

    public static void zadanie1( int n) {

        Scanner input = new Scanner(System.in);
        float maximum = 0;
        for (int i=0; i<n;i++) {
            System.out.println("Podaj liczbe");
            float x = input.nextFloat();
            if(x < 0 && x > maximum) maximum = x;
            if(maximum < x) maximum = x;
        }
        System.out.println(maximum);
    }

    public static void zadanie2(int n){
        Random rand = new Random();
        float[] arr = new float[n];
        float suma = 0;
        for (int i=0; i<n;i++) {
            int test = rand.nextInt(1331) - 777;
            System.out.println(test);
            arr[i] = test;
        }

        for (int i=0; i<n;i++) if(arr[i] > 0) suma += arr[i];
        System.out.println(suma);

    }



    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        zadanie1(n);
        /*
        int n2 = 0;
        int licznik = 0;
        do{
            System.out.println("Podaj liczbe");
            int x = input.nextInt();
            n2 = x;
            if((x > 0) && (x < 151)) licznik ++;
        }
        while(licznik == 0);

        zadanie2(n2);
        */
    }

}