description: Polycarp likes squares and cubes of positive integers. Here is the beginning of the sequence of numbers he likes: 1, 4, 8, 9, ....
  
  For a given number n, count the number of integers from 1 to n that Polycarp likes. In other words, find the number of such x that x is a square of a positive integer number or a cube of a positive integer number (or both a square and a cube simultaneously).
  
  Input
  
  The first line contains an integer t (1 ≤ t ≤ 20) — the number of test cases.
  
  Then t lines contain the test cases, one per line. Each of the lines contains one integer n (1 ≤ n ≤ 10^9).
  
  Output
  
  For each test case, print the answer you are looking for — the number of integers from 1 to n that Polycarp likes.
  
  Example
  
  Input
  
  
  6
  10
  1
  25
  1000000000
  999999999
  500000000
  
  
  Output
  
  
  4
  1
  6
  32591
  32590
  23125
solution: import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.util.HashSet;
  import java.util.StringTokenizer;
  
  public class CF_1619B {
  	public static void main(String[] args) throws NumberFormatException, IOException {
  		MyReader reader = new MyReader();
  		int t = reader.nextInt();
  		for(int testcase=0; testcase<t; testcase++) {
  			int n = reader.nextInt();
  			HashSet<Integer> set = new HashSet<>();
  			for(int i=1; i*i<=n; i++) {
  				set.add(i*i);
  			}
  			for(int i=1; i*i*i<=n; i++) {
  				set.add(i*i*i);
  			}
  			System.out.println(set.size());
  		}
  	}
  	
  	static class MyReader {
          BufferedReader br;
          StringTokenizer st;
          public MyReader() {
              br = new BufferedReader(new InputStreamReader(System.in));
          }
          String next() throws IOException  { 
          	while (st == null || !st.hasMoreElements()) { 
              	st = new StringTokenizer(br.readLine());
          	} 
          	return st.nextToken(); 
          } 
          int nextInt() throws NumberFormatException, IOException { 
          	return Integer.parseInt(next()); 
          }
          long nextLong() throws NumberFormatException, IOException { 
          	return Long.parseLong(next()); 
          }
          double nextDouble() throws NumberFormatException, IOException { 
              return Double.parseDouble(next()); 
          }
          String nextLine() throws IOException {
              return br.readLine(); 
          } 
      }
  }
  