#include <bits/stdc++.h>

#define st first
#define nd second
#define pb push_back
#define rep(i, a, b) for(int i = (a); i < (b); ++i)
#define sci(x) int x; cin >> x;
#define scvi(v, n) vector<int> v(n); rep(i, 0, n) cin >> v[i];

using namespace std;

typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;

inline ll suf(ll a, ll b) {
    return (a + b - 1) / b;
}

inline ll f(ll n) {
    ll res = 0;
    for(ll k = 1; k * k <= n; ++k) {
        res += (2ll * suf(n - k * k + 1, k) - 1ll);
    }
    return res;
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    ll n, m;
    cin >> n >> m;
    cout << f(m) - f(n - 1);


    return 0;
}