#include<map>

#include<set>

#include<cmath>

#include<queue>

#include<stack>

#include<vector>

#include<cstdio>

#include<cassert>

#include<iomanip>

#include<cstdlib>

#include<cstring>

#include<iostream>

#include<algorithm>

#define pi acos(-1)

#define ll long long

#define mod 1000000007

#define ls l,m,rt<<1

#define rs m+1,r,rt<<1|1

#pragma comment(linker, "/STACK:1024000000,1024000000")

using namespace std;

const double g=10.0,eps=1e-;

const int N=+,maxn=,inf=;

int main()

{

    ios::sync_with_stdio(false);

    cin.tie();

    int n,m;

    while(cin>>n>>m){

        if(n>m)swap(n,m);

        int k=m-n,t=k*(+sqrt())/;

        if(n==t)cout<<<<endl;

        else cout<<<<endl;

    }

    return ;

}