#include using namespace std; #define FOR(i,a,b) for(int i=(a);i<(b);++i) #define REP(i,n) FOR(i,0,n) #define ALL(v) begin(v),end(v) template inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; } template inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; } using ll = long long; using pii = pair; constexpr ll INF = 1ll<<30; constexpr ll longINF = 1ll<<60; constexpr ll MOD = 1000000007; constexpr bool debug = false; //---------------------------------// int main() { int X, Y; cin >> X >> Y; vector v; v.emplace_back(INF); for (int i = 0; i * i <= Y; ++i) v.emplace_back(i * i); map mm; for (int i : v) for (int j : v) { if (i == 0 || j == 0) mm[i + j] += 2; else mm[i + j] += 4; } int ans = 0; for (auto [m, c] : mm) if (m >= X && m <= Y) chmax(ans, c); cout << ans << endl; }