#include <bits/stdc++.h>
using namespace std;
const long long maxn = 1e5 + 1;
const long long mod = 1000000009;
const long double eps = 1e-9;
const long long inf = ((1ll << 31ll) - 1ll);
const long long INF = 10000000000000000ll;
const long double pi = acos(-1);
long long qpow(long long b, long long e) {
  if (!e) return 1;
  if (e & 1) return qpow(b, e - 1) * b;
  long long pwur = qpow(b, e >> 1);
  return pwur * pwur;
}
long long a[3] = {10000, 5000, 1000};
int32_t main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.setf(ios::fixed);
  cout.precision(0);
  srand(time(NULL));
  long long a, b;
  cin >> a >> b;
  long long cnt = 0;
  long long num = b;
  while (num > 0) {
    cnt++;
    num /= 10;
  }
  a = a * qpow(10, cnt) + b;
  bool fl = 0;
  for (long long i = 0; i <= 100; i++) {
    if (i * i == a) fl = 1;
  }
  cout << ((fl) ? "Yes" : "No");
  return 0;
}
