#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using int64 = long long; template struct Range { struct RangeIterator { T i, step; RangeIterator(T i, T step): i{i}, step{step} {} T& operator*() { return i; } RangeIterator& operator++() { i += step; return *this; } bool operator!=(const RangeIterator& rhs) const { return (step > 0 && i < rhs.i) || (step < 0 && i > rhs.i); } }; T start, stop, step; Range(T start, T stop, T step): start{start}, stop{stop}, step{step} {} Range(T start, T stop): Range(start, stop, 1) {} Range(T stop): Range(0, stop, 1) {} RangeIterator begin() const { return RangeIterator(start, step); } RangeIterator end() const { return RangeIterator(stop, step); } }; int main() { std::cin.tie(nullptr); std::ios::sync_with_stdio(false); int n, d; std::cin >> n >> d; std::vector counter(2 * n * n + 1, 0); for (int x : Range<>(1, n + 1)) { for (int y : Range<>(1, n + 1)) { counter[x * x + y * y]++; } } int64 ans = 0; for (const auto z : Range<>(1, n + 1)) { for (const auto w : Range<>(1, n + 1)) { // -z^2+w^2+dを計算する int num = -z * z + w * w + d; if (0 < num && num <= 2 * n * n) { ans += counter[num]; } } } std::cout << ans << std::endl; return 0; }