import java.util.*;
public class Main{
public static void main(String[] args){
Scanner input = new Scanner(System.in);
Main obj = new Main();
int testcase = input.nextInt();
int[] i = new int[testcase];
for (int j=0; j<testcase; j++){
i[j] = input.nextInt();
}
for (int j=0; j<testcase; j++){
double sum = 1;
for(int k=1; k<=i[j]; k++){
sum += 1/obj.factorial(k);
}
sum = Math.floor(sum*1000000)/1000000.0;
System.out.printf("%.6f\n", sum);
}
}
public double factorial(int i){
int factorial = 1;
for (int j=1; j<=i; j++){
factorial *= j;
}
return factorial;
}
}
왜 틀린건가요?
