結果
問題 | No.1203 お菓子ゲーム |
ユーザー |
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提出日時 | 2020-08-29 00:46:06 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 542 ms / 2,000 ms |
コード長 | 3,997 bytes |
コンパイル時間 | 2,718 ms |
コンパイル使用メモリ | 202,668 KB |
最終ジャッジ日時 | 2025-01-13 19:51:46 |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 51 |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; using ld = long double; #define rep2(i, m, n) for (int i = (m); i < (n); ++i) #define rep(i, n) rep2(i, 0, n) #define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i) #define drep(i, n) drep2(i, n, 0) #define all(a) (a).begin(), (a).end() template<typename T = int> using V = vector<T>; template<typename T = int> using P = pair<T, T>; using Vi = V<int>; using Vl = V<ll>; using Vd = V<ld>; using Vb = V<bool>; using VVi = V<Vi>; using VVl = V<Vl>; using VVb = V<Vb>; using Pi = P<int>; using Pl = P<ll>; using Pd = P<ld>; template<typename T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); } template<typename... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); } template<typename T> inline int sz(T &x) { return x.size(); } template<typename T> inline bool chmin(T &a, T b) { if (a > b) { a = b; return true; } return false; } template<typename T> inline bool chmax(T &a, T b) { if (a < b) { a = b; return true; } return false; } template<typename T1, typename T2> istream &operator>>(istream &is, pair<T1, T2> &p) { is >> p.first >> p.second; return is; } template<typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &p) { os << '(' << p.first << ", " << p.second << ')'; return os; } template<typename T> istream &operator>>(istream &is, vector<T> &v) { for (auto &e : v) is >> e; return is; } template<typename T> ostream &operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; } template<typename T> inline int count_between(vector<T> &a, T l, T r) { return lower_bound(all(a), r) - lower_bound(all(a), l); } // [l, r) inline int fLog2(const ll x) { assert(x > 0); return 63-__builtin_clzll(x); } // floor(log2(x)) inline int cLog2(const ll x) { assert(x > 0); return (x == 1) ? 0 : 64-__builtin_clzll(x-1); } // ceil(log2(x)) inline int popcount(const ll x) { return __builtin_popcountll(x); } inline void fail() { cout << -1 << '\n'; exit(0); } struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; // const int INF = 1<<30; // const ll INFll = 1ll<<60; // const ld EPS = 1e-10; // const ld PI = acos(-1.0); // const int MOD = int(1e9)+7; // const int MOD = 998244353; struct Eratos { vector<int> primes, min_factor; vector<bool> isprime; Eratos(int MAX) : primes(), isprime(MAX+1, true), min_factor(MAX+1, -1) { isprime[0] = isprime[1] = false; min_factor[0] = 0, min_factor[1] = 1; for (int i = 2; i <= MAX; i++) { if (!isprime[i]) continue; primes.push_back(i); min_factor[i] = i; for (int j = i*2; j <= MAX; j += i) { isprime[j] = false; if (min_factor[j] == -1) min_factor[j] = i; } } } // prime factorization vector<pair<int,int>> factorize(int n) { vector<pair<int,int>> res; while (n != 1) { int prime = min_factor[n]; int exp = 0; while (min_factor[n] == prime) { ++exp; n /= prime; } res.emplace_back(prime, exp); } return res; } // enumerate divisors vector<int> divisors(int n) { vector<int> res({1}); auto pf = factorize(n); for (auto p : pf) { int k = res.size(); for (int i = 0; i < k; ++i) { int v = 1; for (int j = 0; j < p.second; ++j) { v *= p.first; res.push_back(res[i] * v); } } } return res; } }; Eratos er(int(1e7)+2); ll solve(ll x, ll y) { auto dv = er.divisors(y); ll res = 0; for (ll b : dv) { if (b % 2 == 0) continue; ll z = y / b * (b*b-1); if (z % (2*x) != 0) continue; ll a = z / (2*x); if (1 <= b && b < a && a <= int(1e8)) ++res; } if (y > 2*x) res += int(1e8) / y; return res; } int main() { int Q; cin >> Q; rep(_, Q) { int x, y; cin >> x >> y; int ans = solve(x, y) + solve(y-x, y); cout << ans << '\n'; } }