結果
問題 | No.551 夏休みの思い出(2) |
ユーザー | Pachicobue |
提出日時 | 2017-07-29 00:16:26 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 3,720 bytes |
コンパイル時間 | 1,900 ms |
コンパイル使用メモリ | 178,248 KB |
実行使用メモリ | 9,268 KB |
最終ジャッジ日時 | 2024-10-10 07:08:28 |
合計ジャッジ時間 | 8,354 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 5 ms
6,824 KB |
testcase_04 | RE | - |
testcase_05 | AC | 18 ms
6,816 KB |
testcase_06 | AC | 17 ms
6,816 KB |
testcase_07 | AC | 2 ms
6,820 KB |
testcase_08 | RE | - |
testcase_09 | AC | 2 ms
6,816 KB |
testcase_10 | RE | - |
testcase_11 | RE | - |
testcase_12 | AC | 2 ms
6,816 KB |
testcase_13 | RE | - |
testcase_14 | AC | 3 ms
6,816 KB |
testcase_15 | RE | - |
testcase_16 | AC | 2 ms
6,820 KB |
testcase_17 | AC | 2 ms
6,816 KB |
testcase_18 | AC | 2 ms
6,816 KB |
testcase_19 | AC | 2 ms
6,820 KB |
testcase_20 | AC | 2 ms
6,820 KB |
testcase_21 | AC | 115 ms
6,820 KB |
testcase_22 | AC | 2 ms
6,820 KB |
testcase_23 | RE | - |
testcase_24 | RE | - |
testcase_25 | AC | 2 ms
6,816 KB |
testcase_26 | AC | 3 ms
6,820 KB |
testcase_27 | RE | - |
testcase_28 | AC | 44 ms
6,820 KB |
testcase_29 | RE | - |
testcase_30 | RE | - |
testcase_31 | AC | 42 ms
6,820 KB |
testcase_32 | RE | - |
testcase_33 | AC | 45 ms
6,820 KB |
testcase_34 | RE | - |
testcase_35 | AC | 43 ms
6,816 KB |
testcase_36 | AC | 46 ms
6,820 KB |
testcase_37 | AC | 50 ms
6,816 KB |
testcase_38 | RE | - |
testcase_39 | AC | 47 ms
6,816 KB |
testcase_40 | AC | 50 ms
6,820 KB |
testcase_41 | RE | - |
testcase_42 | AC | 48 ms
6,820 KB |
testcase_43 | AC | 46 ms
6,816 KB |
testcase_44 | AC | 47 ms
6,816 KB |
testcase_45 | AC | 45 ms
6,816 KB |
testcase_46 | RE | - |
testcase_47 | AC | 3 ms
6,820 KB |
testcase_48 | AC | 2 ms
6,816 KB |
ソースコード
#include <bits/stdc++.h> #define show(x) cerr << #x << " = " << x << endl using namespace std; using ll = long long; using pii = pair<int, int>; using vi = vector<int>; template <typename T> ostream& operator<<(ostream& os, const vector<T>& v) { os << "sz=" << v.size() << "\n["; for (const auto& p : v) { os << p << ","; } os << "]\n"; return os; } template <typename S, typename T> ostream& operator<<(ostream& os, const pair<S, T>& p) { os << "(" << p.first << "," << p.second << ")"; return os; } constexpr ll MOD = 1e9 + 7; template <typename T> constexpr T INF = numeric_limits<T>::max() / 100; ll P, R; ll power(ll p, ll n) { if (n == 0) { return 1; } if (n % 2 == 0) { const ll q = power(p, n / 2); return (q * q) % P; } else { return (p * power(p, n - 1)) % P; } } template <typename T> pair<T, T> extgcd(const T x, const T y) // x,y>0 & relatively prime // returns (a,b) s.t. ax+by=1 { ll r0 = x; ll r1 = y; ll a0 = 1; ll a1 = 0; ll b0 = 0; ll b1 = 1; while (r1 > 0) { const ll q1 = r0 / r1; const ll r2 = r0 % r1; const ll a2 = a0 - q1 * a1; const ll b2 = b0 - q1 * b1; r0 = r1; r1 = r2; a0 = a1; a1 = a2; b0 = b1; b1 = b2; } return make_pair(a0 / r0, b0 / r0); } bool quadratic(ll a) { if (a == 0) { return true; } return power(a, (P - 1) / 2) == 1; } ll divide(ll a, ll b, ll mod = P) // b/a { const ll x = (((extgcd(a, mod).first + mod) % mod) * b) % mod; assert((a * x) % mod == b); return x; } template <typename T> T gcd(const T a, const T b) { return b ? gcd(b, a % b) : a; } mt19937 mt{random_device{}()}; ll rho(ll a) { const ll mod = P - 1; static uniform_int_distribution<ll> dist{0, P - 2}; unordered_map<ll, pair<ll, ll>> mp; while (true) { const ll alpha = dist(mt); const ll beta = dist(mt); const ll c = (power(a, alpha) * power(R, beta)) % P; if (mp.find(c) != mp.end()) { const auto& p = mp[c]; const ll alpha_ = p.first; const ll beta_ = p.second; if (alpha == alpha_) { continue; } const ll a_ = (((alpha_ - alpha) % mod) + mod) % mod; const ll b_ = (((beta - beta_) % mod) + mod) % mod; const ll g = gcd(a_, b_); const ll x = divide(a_ / g, b_ / g, mod); if (power(R, x) == a) { return x; } } mp[c] = make_pair(alpha, beta); } } ll square_root(ll n) { if (n == 0) { return 0; } if (P % 4 == 3) { return power(n, (P + 1) / 4); } const ll a = rho(n); const ll ind = (a % 2 == 0) ? a / 2 : (a + P) / 2; return power(R, ind); } int main() { cin >> P >> R; ll Q; cin >> Q; for (ll q = 0; q < Q; q++) { ll A, B, C; cin >> A >> B >> C; const ll elem = (((B * B) % P - (4 * A * C) % P) % P + P) % P; if (not quadratic(elem)) { cout << -1 << endl; continue; } const ll root = square_root(elem); const ll mini = ((-root - B) % P + P) % P; const ll maxi = ((root - B) % P + P) % P; const ll g1 = gcd(2 * A, mini); const ll g2 = gcd(2 * A, maxi); const ll ans1 = divide(2 * A / g1, mini / g1); const ll ans2 = divide(2 * A / g2, maxi / g2); if (ans1 == ans2) { cout << ans1 << endl; } else { cout << min(ans1, ans2) << " " << max(ans1, ans2) << endl; } } return 0; }