#include<bits/stdc++.h>
using namespace std;
const int MOD = 998244353;

long long f(long long x)
{
    return x * (x+1)/2 % MOD;
}

void solve()
{
long long a,b,c;
cin >> a >> b >> c;

cout << ((f(a) * f(b))%MOD * f(c))%MOD;






}

int main()
{
int t=1;
//cin >> t;
while (t--) solve();
}



/*
1
6
1 2 6 5 3 4
*/



#include <bits/stdc++.h>

using namespace std;

long long  a, b, c;



int main() {
    
    cin >> a >> b >> c;
    if (a * a + b * b < c * c) cout << "Yes" << endl;
    else cout << "No" << endl;
    return 0;
}
