public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
FileInputStream inputStream = new FileInputStream(reader.readLine());
TreeSet<Integer> set = new TreeSet<>();
while (inputStream.available() > 0){
set.add(inputStream.read());
}
System.out.println(set.first());
inputStream.close();
}
}package com.javarush.task.task18.task1802;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.TreeSet;
/*
Минимальный байт
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
FileInputStream inputStream = new FileInputStream(reader.readLine());
TreeSet<Integer> set = new TreeSet<>();
while (inputStream.available() > 0){
set.add(inputStream.read());
}
System.out.println(set.first());
inputStream.close();
}
}