day 5, A 100

#include <bits/stdc++.h>
// tiom4eg's precompiler options
// POGGERS POGGERS POGGERS POGGERS POGGERS POGGERS POGGERS
// IO settings
#define fastIO ios_base::sync_with_stdio(false); cin.tie(0)
// Quick types
#define ll long long
#define ld long double
#define ull unsigned long long
#define pii pair <int, int>
#define vi vector <int>
#define mi vector <vector <int>>
// Quick functions
#define endl "\n"
#define F first
#define S second
#define all(a) a.begin(), a.end()
//#define sz(a) (int)(a.size())
#define pb push_back
#define mp make_pair
// Quick fors
#define FOR(i, a, b) for (int i = a; i < b; ++i)
#define FORS(i, a, b, c) for (int i = a; i < b; i += c)
#define RFOR(i, a, b) for (int i = a; i >= b; --i)
#define EACH(e, a) for (auto& e : a)
// Pragmas
#ifndef TIOM4EG
#pragma GCC optimize("O3") // let the chaos begin!
#pragma GCC target("avx,avx2,bmi,bmi2,popcnt,lzcnt,tune=native")
#pragma GCC comment(linker, "/stack:200000000")
#endif
// PBDS
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ordered_set tree <int, null_type, less <int>, rb_tree_tag, tree_order_statistics_node_update>
#define ook order_of_key
#define fbo find_by_order
using namespace __gnu_pbds;
// POGGERS POGGERS POGGERS POGGERS POGGERS POGGERS POGGERS
using namespace std;
mt19937 rng(chrono::duration_cast<chrono::milliseconds>(chrono::system_clock::now().time_since_epoch()).count());
#define int long long
const int INF = 1e9 + 7, MD = 998244353, MAX = 300005, R = 1 << 19, MOD = 1e9 + 7, MOD2 = 1e9 + 9, MOD12 = MOD * MOD, MOD22 = MOD2 * MOD2, LG = 20, B1 = 300007, B2 = 107, S = 10008;
const ll INFLL = 1e18 + 7;

signed main() {
    fastIO;
    int a, b, ans = 0; cin >> a >> b;
    if (a > b) swap(a, b);
    FOR(r, 1, 45000) {
        int l1 = 0, r1 = 2 * INF;
        while (l1 < r1 - 1) {
            int m1 = (l1 + r1) / 2;
            ((r * m1) / 2 <= a ? l1 : r1) = m1;
        }
        int l2 = 0, r2 = 2 * INF;
        while (l2 < r2 - 1) {
            int m2 = (l2 + r2) / 2;
            ((r * m2 + 1) / 2 <= b ? l2 : r2) = m2;
        }
        ans += max(min(l1, l2) - r + 1, 0LL);
    }
    cout << ans;
}