結果
問題 | No.187 中華風 (Hard) |
ユーザー | tac |
提出日時 | 2020-02-04 23:11:02 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,527 bytes |
コンパイル時間 | 2,069 ms |
コンパイル使用メモリ | 185,724 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-09-21 07:49:05 |
合計ジャッジ時間 | 8,701 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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 | 247 ms
6,816 KB |
testcase_01 | AC | 244 ms
6,944 KB |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 2 ms
6,940 KB |
testcase_18 | AC | 197 ms
6,940 KB |
testcase_19 | AC | 2 ms
6,940 KB |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
ソースコード
#include<bits/stdc++.h> using namespace std; typedef long long ll; #define F first #define S second #define pii pair<int, int> #define eb emplace_back #define all(v) v.begin(), v.end() #define rep(i, n) for (int i = 0; i < (n); ++i) #define rep3(i, l, n) for (int i = l; i < (n); ++i) #define sz(v) (int)v.size() const int inf = 1e9 + 7; const ll INF = 1e18; #define abs(x) (x >= 0 ? x : -(x)) #define lb(v, x) (int)(lower_bound(all(v), x) - v.begin()) #define ub(v, x) (int)(upper_bound(all(v), x) - v.begin()) template<typename T1, typename T2> inline bool chmin(T1 &a, T2 b) { if (a > b) { a = b; return 1; } return 0; } template<typename T1, typename T2> inline bool chmax(T1 &a, T2 b) { if (a < b) { a = b; return 1; } return 0; } template<typename T> T gcd(T a, T b) { if (b == 0) return a; return gcd(b, a % b); } template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; } template<typename T> T pow(T a, int b) { return b ? pow(a * a, b / 2) * (b % 2 ? a : 1) : 1; } const int mod = 1000000007; ll modpow(ll a, int b) { return b ? modpow(a * a % mod, b / 2) * (b % 2 ? a : 1) % mod : 1; } template<class T> ostream& operator<<(ostream& os, const vector<T>& v) { rep(i, sz(v)) { if (i) os << " "; os << v[i]; } return os; } template<class T, class U> ostream& operator<<(ostream& os, const pair<T, U>& p) { os << p.F << " " << p.S; return os; } template<class T> inline void add(T &a, int b) { a += b; if (a >= mod) a - mod; } void solve(); int main() { ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); int T; // cin >> T; T = 1; while (T--) { solve(); } } // https://atcoder.jp/contests/ddcc2019-qual/submissions/9899069 ll ext_gcd(ll a, ll b, ll &x, ll &y) { if (b == 0) { x = 1, y = 0; return a; } ll x2, y2; ll d = ext_gcd(b, a % b, x2, y2); x = y2; y = x2 - (a / b) * y2; return d; } ll mod_inv(ll a, ll m) { ll x, y; ll d = ext_gcd(a, m, x, y); // ax + my = 1, ax ≡ 1 if (d != 1) { return -1; } x %= m; if (x < 0) x += m; return x; } ll garner(vector<ll> r, vector<ll> m) { int n = sz(r); ll m_prod = 1; ll x = r[0] % m[0]; rep3(i, 1, n) { m_prod *= m[i - 1]; ll t = (r[i] - x) * mod_inv(m_prod, m[i]); t %= m[i]; if (t < 0) t += m[i]; x += t * m_prod; } return x; } map<ll, int> prime_factorize(ll n) { ll tmp = n; map<ll, int> mp; for (ll i = 2; i * i <= n; ++i) { ll cnt = 0; while (tmp % i == 0) { tmp /= i; cnt++; } if (cnt) mp[i] = cnt; } if (tmp != 1) mp[tmp] = 1; return mp; } void solve() { int n; cin >> n; vector<pair<ll, ll> > g(n); rep(i, n) cin >> g[i].F >> g[i].S; map<ll, int> mp, mp2; vector<map<ll, int> > v(n); rep(i, n) v[i] = prime_factorize(g[i].S); rep(i, n) { for (auto e : v[i]) { if (chmax(mp[e.F], e.S)) { mp2[e.F] = i; } } } // for (auto e : mp) cout << e.F << " " << e.S << " " << mp2[e.F] << endl; vector<ll> r(n), m(n); rep(i, n) r[i] = g[i].F, m[i] = g[i].S; for (auto e : mp) { rep(i, n) { if (!v[i].count(e.F) || i == mp2[e.F]) continue; ll d = pow(e.F, v[i][e.F]); m[i] /= d; r[i] %= m[i]; } // cout << endl << e.F << endl; // rep(i, n) cout << g[i] << endl; } ll x = garner(r, m); rep(i, n) { // sample3 のような, y が素数のとき 1 0 になる if (x % g[i].S != g[i].F) { cout << -1 << endl; return; } } cout << x << endl; }