в чем ошибка?
package com.javarush.task.task05.task0532;
import java.io.*;
/*
Задача по алгоритмам
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int maximum = 0;
for (;;){
int N = Integer.parseInt(reader.readLine());
if (N<=0) break;
maximum = Math.max(maximum, N);
}
System.out.println(maximum);
}
}