#include using namespace std; using ll = long long; using P = pair; using Graph = vector>; #define rep(i, n) for(ll i=0;i<(ll)(n);i++) #define rep2(i, m, n) for(ll i=m;i<(ll)(n);i++) #define rrep(i, n, m) for(ll i=n;i>=(ll)(m);i--) const int dx[4] = {1, 0, -1, 0}; const int dy[4] = {0, 1, 0, -1}; const int ddx[8] = {0, 1, 1, 1, 0, -1, -1, -1}; const int ddy[8] = {1, 1, 0, -1, -1, -1, 0, 1}; const ll MOD = 1000000007; const ll INF = 1000000000000000000L; #ifdef __DEBUG /** * For DEBUG * https://github.com/ta7uw/cpp-pyprint */ #include "cpp-pyprint/pyprint.h" #endif void Main() { ll d1, d2; cin >> d1 >> d2; if (d1 < d2 / 2) { cout << 0 << '\n'; } else if (d1 == d2 / 2) { cout << 4 << '\n'; } else if (d1 > d2 / 2 && d1 < d2) { cout << 8 << '\n'; } else if (d1 == d2) { cout << 4 << '\n'; } else { cout << 0 << '\n'; } } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); Main(); return 0; }