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package com.javarush.task.task18.task1817;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
/*
Пробелы
*/
public class Solution {
public static void main(String[] args) throws IOException {
FileInputStream fileInputStream =new FileInputStream(args[0]);
byte[] mas =new byte[fileInputStream.available()];
while(fileInputStream.available()>0){
fileInputStream.read(mas);
}
fileInputStream.close();
int space=0;
int simvol=0;
for (int i = 0; i <mas.length ; i++) {
if (mas[i]==32){
space++;
}else{
simvol++;
}
}
float itog=(float)(simvol/space)*100;
System.out.printf("%.2f",itog);
}
}