#include <bits/stdc++.h>

#define ll long long
#define rep(i, n) for(int i = 0; i < n; i++)
#define rrep(i, n) for(int i = 1; i <= n; i++)
#define drep(i, n) for(int i = n-1; i >= 0; i--)
#define srep(i, s, t) for (int i = s; i < t; i++)
#define vi vector<int>
#define P pair<ll, ll>
using namespace std;
int mod = 1'000'000'000 + 7;
struct edge {
    int to;
    ll cost;
};

void COME_LET_THE_GAMES_BEGIN() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << setprecision(20);
}

int main() {
    COME_LET_THE_GAMES_BEGIN();
    string a, b;
    cin >> a >> b;
    ll p = stoll(a + b);
    if (p == pow((ll)sqrt(p), 2)) {
        cout << "Yes" << endl;
    } else {
        cout << "No" << endl;
    }
}
