/* このコード、と~おれ! Be accepted! ∧_∧  (。・ω・。)つ━☆・*。 ⊂   ノ    ・゜+.  しーJ   °。+ *´¨)          .· ´¸.·*´¨) ¸.·*¨)           (¸.·´ (¸.·'* ☆ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include //#pragma GCC target("arch=skylake-avx512") #pragma GCC target("avx2") //#pragma GCC optimize("O3") #pragma GCC optimize("Ofast") #pragma GCC target("sse4") #pragma GCC optimize("unroll-loops") //#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native") #define repeat(i, n, m) for(int i = n; i < (m); ++i) #define rep(i, n) for(int i = 0; i < (n); ++i) #define printynl(a) printf(a ? "yes\n" : "no\n") #define printyn(a) printf(a ? "Yes\n" : "No\n") #define printYN(a) printf(a ? "YES\n" : "NO\n") #define printim(a) printf(a ? "possible\n" : "imposible\n") #define printdb(a) printf("%.50lf\n", a) #define printLdb(a) printf("%.50Lf\n", a) #define printdbd(a) printf("%.16lf\n", a) #define prints(s) printf("%s\n", s.c_str()) #define all(x) (x).begin(), (x).end() #define deg_to_rad(deg) (((deg)/360.0L)*2.0L*PI) #define rad_to_deg(rad) (((rad)/2.0L/PI)*360.0L) #define Please return #define AC 0 #define manhattan_dist(a, b, c, d) (abs(a - c) + abs(b - d)) using ll = long long; using ull = unsigned long long; constexpr int INF = 1073741823; constexpr int MINF = -1073741823; constexpr ll LINF = ll(4661686018427387903); constexpr ll MOD = 1e9 + 7; constexpr ll mod = 998244353; constexpr long double eps = 1e-6; const long double PI = acosl(-1.0L); using namespace std; void scans(string& str) { char c; str = ""; scanf("%c", &c); if (c == '\n')scanf("%c", &c); while (c != '\n' && c != -1 && c != ' ') { str += c; scanf("%c", &c); } } void scanc(char& str) { char c; scanf("%c", &c); if (c == -1)return; while (c == '\n') { scanf("%c", &c); } str = c; } double acot(double x) { return PI / 2 - atan(x); } ll LSB(ll n) { return (n & (-n)); } template inline T chmin(T& a, const T& b) { if (a > b)a = b; return a; } template inline T chmax(T& a, const T& b) { if (a < b)a = b; return a; } //cpp_int #if __has_include() #include #include using namespace boost::multiprecision; #else using cpp_int = ll; #endif //atcoder library #if __has_include() #include //using namespace atcoder; #endif /* random_device seed_gen; mt19937 engine(seed_gen()); uniform_int_distribution dist(1, 100); */ /*----------------------------------------------------------------------------------*/ vector< int64_t > divisor(int64_t n) { vector< int64_t > ret; for (int64_t i = 1; i * i <= n; i++) { if (n % i == 0) { ret.push_back(i); if (i * i != n) ret.push_back(n / i); } } sort(begin(ret), end(ret)); return (ret); } ll sq(ll n) { ll ng = -1, ok = 3 * 1e9; while (abs(ng - ok) > 1) { ll mid = (ok + ng) / 2; if (mid * mid >= n)ok = mid; else ng = mid; } if (ok * ok == n)return ok; else return -1; } int main() { int T; scanf("%d", &T); while (T--) { ll s, t; scanf("%lld%lld", &s, &t); s *= 4; vector ddd, d; { auto dd = divisor(s); for (const auto& p : dd) { for (const auto& q : dd) { ddd.push_back(p * q); } } } s = s * s; if (s % t) { puts("0"); continue; } s /= t; for (const auto& aa : ddd) { d.push_back((aa % t) ? aa : aa / t); } sort(all(d)); d.erase(unique(all(d)), d.end()); ll a = -1, b = -1, c = -1, x = 0, y = 0, z = 0; set> ans; for (const auto& aa : d) { ll k = s / aa, r = t - aa; x = aa; if (r <= 0 or r * r - 4 * k < 0)continue; ll p = sq(r * r - 4 * k); if (p == -1)continue; if ((r - p) > 0 and (r - p) % 2 == 0) { y = (r - p) / 2; z = t - x - y; if ((x + y) % 2 or (y + z) % 2 or (z + x) % 2)continue; a = y + z; b = z + x; c = x + y; a /= 2; b /= 2; c /= 2; ans.insert({ a, b, c }); } if ((r + p) > 0 and (r + p) % 2 == 0) { y = (r + p) / 2; z = t - x - y; if ((x + y) % 2 or (y + z) % 2 or (z + x) % 2)continue; a = y + z; b = z + x; c = x + y; a /= 2; b /= 2; c /= 2; ans.insert({ a, b, c }); } } if(ans.size() == 0){ puts("0"); continue; } printf("%d\n", (int)ans.size()); for (const auto& aa : ans) { for (const auto& aaa : aa)printf("%lld ", aaa); puts(""); } } Please AC; }