import java.io.*;
import java.util.*;
public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        String[] s = r.ss();
        int n = Int(s[0]+s[1]);
        println(n%(int)Math.sqrt(n) == 0 ? "Yes" : "No");
    }
    static void print(Object o){
        System.out.print(o.toString());
    }
    static void println(Object o){
        print(o+"\n");
    }
    static int Int(String s){
        return Integer.parseInt(s);
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }
        String s() throws IOException{
            return readLine();
        }
        String[] ss() throws IOException{
            return s().split(" ");
        }
        int i() throws IOException{
            return Int(s());
        }
        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
} import java.io.*; io.* java import java.util.*; util.* java public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        String[] s = r.ss();
        int n = Int(s[0]+s[1]);
        println(n%(int)Math.sqrt(n) == 0 ? "Yes" : "No");
    }
    static void print(Object o){
        System.out.print(o.toString());
    }
    static void println(Object o){
        print(o+"\n");
    }
    static int Int(String s){
        return Integer.parseInt(s);
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }
        String s() throws IOException{
            return readLine();
        }
        String[] ss() throws IOException{
            return s().split(" ");
        }
        int i() throws IOException{
            return Int(s());
        }
        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
} Main public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        String[] s = r.ss();
        int n = Int(s[0]+s[1]);
        println(n%(int)Math.sqrt(n) == 0 ? "Yes" : "No");
    } main {
        Reader r = new Reader();
        String[] s = r.ss();
        int n = Int(s[0]+s[1]);
        println(n%(int)Math.sqrt(n) == 0 ? "Yes" : "No");
    } Reader r = new Reader(); r new Reader() String[] s = r.ss(); s r.ss() r.ss r int n = Int(s[0]+s[1]); n Int(s[0]+s[1]) Int s[0]+s[1] s[0] s 0 s[1] s 1 println(n%(int)Math.sqrt(n) == 0 ? "Yes" : "No") println n%(int)Math.sqrt(n) == 0 ? "Yes" : "No" n%(int)Math.sqrt(n) == 0 n%(int)Math.sqrt(n) n (int)Math.sqrt(n) Math.sqrt Math n 0 "Yes" "No" String[] args args static void print(Object o){
        System.out.print(o.toString());
    } print {
        System.out.print(o.toString());
    } System.out.print(o.toString()) System.out.print System.out System System.out o.toString() o.toString o Object o o static void println(Object o){
        print(o+"\n");
    } println {
        print(o+"\n");
    } print(o+"\n") print o+"\n" o "\n" Object o o static int Int(String s){
        return Integer.parseInt(s);
    } Int {
        return Integer.parseInt(s);
    } return Integer.parseInt(s); Integer.parseInt(s) Integer.parseInt Integer s String s s static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }
        String s() throws IOException{
            return readLine();
        }
        String[] ss() throws IOException{
            return s().split(" ");
        }
        int i() throws IOException{
            return Int(s());
        }
        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    } Reader Reader(){
            super(new InputStreamReader(System.in));
        } Reader {
            super(new InputStreamReader(System.in));
        } super(new InputStreamReader(System.in)) super new InputStreamReader(System.in) String s() throws IOException{
            return readLine();
        } s {
            return readLine();
        } return readLine(); readLine() readLine String[] ss() throws IOException{
            return s().split(" ");
        } ss {
            return s().split(" ");
        } return s().split(" "); s().split(" ") s().split s() s " " int i() throws IOException{
            return Int(s());
        } i {
            return Int(s());
        } return Int(s()); Int(s()) Int s() s int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        } ii {
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        } String[] ss = ss(); ss ss() ss int size = ss.length; size ss.length ss ss.length int[] ii = new int[size]; ii new int[size] size for(int j = 0; j < size; j++) ii[j] = Int(ss[j]); int j = 0; int j = 0; j 0 j < size j size j++ j++ j ii[j] = Int(ss[j]); ii[j] = Int(ss[j]) ii[j] ii j Int(ss[j]) Int ss[j] ss j return ii; ii BufferedReader public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        String[] s = r.ss();
        int n = Int(s[0]+s[1]);
        println(n%(int)Math.sqrt(n) == 0 ? "Yes" : "No");
    }
    static void print(Object o){
        System.out.print(o.toString());
    }
    static void println(Object o){
        print(o+"\n");
    }
    static int Int(String s){
        return Integer.parseInt(s);
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }
        String s() throws IOException{
            return readLine();
        }
        String[] ss() throws IOException{
            return s().split(" ");
        }
        int i() throws IOException{
            return Int(s());
        }
        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
} public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        String[] s = r.ss();
        int n = Int(s[0]+s[1]);
        println(n%(int)Math.sqrt(n) == 0 ? "Yes" : "No");
    }
    static void print(Object o){
        System.out.print(o.toString());
    }
    static void println(Object o){
        print(o+"\n");
    }
    static int Int(String s){
        return Integer.parseInt(s);
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }
        String s() throws IOException{
            return readLine();
        }
        String[] ss() throws IOException{
            return s().split(" ");
        }
        int i() throws IOException{
            return Int(s());
        }
        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
} Main
import java.io.*;
import java.util.*;
public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        String[] s = r.ss();
        int n = Int(s[0]+s[1]);
        println(n%(int)Math.sqrt(n) == 0 ? "Yes" : "No");
    }
    static void print(Object o){
        System.out.print(o.toString());
    }
    static void println(Object o){
        print(o+"\n");
    }
    static int Int(String s){
        return Integer.parseInt(s);
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }
        String s() throws IOException{
            return readLine();
        }
        String[] ss() throws IOException{
            return s().split(" ");
        }
        int i() throws IOException{
            return Int(s());
        }
        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
}
