import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author ky112233
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        B121 solver = new B121();
        solver.solve(1, in, out);
        out.close();
    }

    static class B121 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int cnt = 0;
            int temp = b;
            while (temp != 0) {
                cnt++;
                temp /= 10;
            }
            a = a * (int) Math.pow(10, cnt) + b;
            for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            }
            out.println("No");
        }

    }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        B121 solver = new B121();
        solver.solve(1, in, out);
        out.close();
    }

    static class B121 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int cnt = 0;
            int temp = b;
            while (temp != 0) {
                cnt++;
                temp /= 10;
            }
            a = a * (int) Math.pow(10, cnt) + b;
            for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            }
            out.println("No");
        }

    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        B121 solver = new B121();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        B121 solver = new B121();
        solver.solve(1, in, out);
        out.close();
    } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out Scanner in = new Scanner(inputStream); in new Scanner(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) B121 solver = new B121(); solver new B121() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class B121 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int cnt = 0;
            int temp = b;
            while (temp != 0) {
                cnt++;
                temp /= 10;
            }
            a = a * (int) Math.pow(10, cnt) + b;
            for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            }
            out.println("No");
        }

    } B121 public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int cnt = 0;
            int temp = b;
            while (temp != 0) {
                cnt++;
                temp /= 10;
            }
            a = a * (int) Math.pow(10, cnt) + b;
            for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            }
            out.println("No");
        } solve {
            int a = in.nextInt();
            int b = in.nextInt();
            int cnt = 0;
            int temp = b;
            while (temp != 0) {
                cnt++;
                temp /= 10;
            }
            a = a * (int) Math.pow(10, cnt) + b;
            for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            }
            out.println("No");
        } int a = in.nextInt(); a in.nextInt() in.nextInt in int b = in.nextInt(); b in.nextInt() in.nextInt in int cnt = 0; cnt 0 int temp = b; temp b while (temp != 0) {
                cnt++;
                temp /= 10;
            } temp != 0 temp 0 {
                cnt++;
                temp /= 10;
            } cnt++ cnt temp /= 10 temp 10 a = a * (int) Math.pow(10, cnt) + b a a * (int) Math.pow(10, cnt) + b a * (int) Math.pow(10, cnt) a (int) Math.pow(10, cnt) Math.pow Math 10 cnt b for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            } int i = 1; int i = 1; i 1 i * i <= a i * i i i a i++ i++ i {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            } {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            } if (i * i == a) {
                    out.println("Yes");
                    return;
                } i * i == a i * i i i a {
                    out.println("Yes");
                    return;
                } out.println("Yes") out.println out "Yes" return; out.println("No") out.println out "No" int testNumber testNumber Scanner in in PrintWriter out out public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        B121 solver = new B121();
        solver.solve(1, in, out);
        out.close();
    }

    static class B121 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int cnt = 0;
            int temp = b;
            while (temp != 0) {
                cnt++;
                temp /= 10;
            }
            a = a * (int) Math.pow(10, cnt) + b;
            for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            }
            out.println("No");
        }

    }
} public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        B121 solver = new B121();
        solver.solve(1, in, out);
        out.close();
    }

    static class B121 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int cnt = 0;
            int temp = b;
            while (temp != 0) {
                cnt++;
                temp /= 10;
            }
            a = a * (int) Math.pow(10, cnt) + b;
            for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            }
            out.println("No");
        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author ky112233
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        B121 solver = new B121();
        solver.solve(1, in, out);
        out.close();
    }

    static class B121 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int cnt = 0;
            int temp = b;
            while (temp != 0) {
                cnt++;
                temp /= 10;
            }
            a = a * (int) Math.pow(10, cnt) + b;
            for (int i = 1; i * i <= a; i++) {
                if (i * i == a) {
                    out.println("Yes");
                    return;
                }
            }
            out.println("No");
        }

    }
}

