ошибку выдает.

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String s = reader.readLine();
        int n = Integer.parseInt(s);
        String s1 = reader.readLine();
        int n1 = Integer.parseInt(s1);
        String s2 = reader.readLine();
        int n2 = Integer.parseInt(s2);
        String s3 = reader.readLine();
        int n3 = Integer.parseInt(s3);
        if ( n>=n1&&n>=n2&&n>=n3){System.out.print(n);}
        else if(n1>=n2&&n1>=n3&&n1>=n){System.out.print(n1);}
        else if(n2>=n3&&n1>=n&&n1>=n1){System.out.print(n2);}
        else{ System.out.print(n3);
    }
}}