3ий пункт

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String fileName;
        int min = 0;
        int temp;
        fileName = br.readLine();
        FileInputStream fs = new FileInputStream(fileName);
        while (fs.available() > 0) {
            temp = fs.read();
            if (temp < min) {
                min = temp;

            }
        }
        System.out.println(min);
        br.close();
        fs.close();
    }
}

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        String nameFile;
        int max=0;
        int temp;
        nameFile=br.readLine();
        FileInputStream fi=new FileInputStream(nameFile);
        while (fi.available() >0) {
            temp=fi.read();
            if(temp>max) {
                max=temp;
            }
        }
        System.out.println(max);
        br.close();
        fi.close();
    }
}