import std.algorithm;
import std.array;
import std.conv;
import std.math;
import std.range;
import std.stdio;
import std.string;
import std.typecons;

T read(T)() { return readln.chomp.to!T; }
T[] reads(T)() { return readln.split.to!(T[]); }
alias readint = read!int;
alias readints = reads!int;

void main() {
    auto ab = reads!string;
    auto s = ab[0] ~ ab[1];

    int n = s.to!int;
    int x = cast(int)sqrt(1.0 * n);
    writeln(n == x * x ? "Yes" : "No");
}
