Unable to pass task 5 spent lot of hours on this one. Please help.
package com.codegym.task.task05.task0532;
import java.io.*;
import java.util.Scanner;
import java.util.Arrays;
/*
Task about algorithms
*/
public class Solution {
public static void main(String[] args) throws Exception {
Scanner sr = new Scanner(System.in);
int len = sr.nextInt();
int maximum = 0;
//System.out.println("len"+len);
//write your code here
if(len>0){
for(int i=0;i<len;i++){
int num1=sr.nextInt();
//System.out.println(num1);
if(num1>maximum)
maximum = num1;
}
}
if(maximum>0)
System.out.println(maximum);
}
}