結果

問題 No.2125 Inverse Sum
ユーザー miscalcmiscalc
提出日時 2022-11-18 21:44:22
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
WA  
実行時間 -
コード長 2,847 bytes
コンパイル時間 4,858 ms
コンパイル使用メモリ 260,720 KB
最終ジャッジ日時 2025-02-08 21:33:08
ジャッジサーバーID
（参考情報） 		judge1 / judge5
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ファイルパターン 結果
sample AC * 3
other AC * 19 WA * 11
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ソースコード

diff # 

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using tlll = tuple<ll, ll, ll>;
constexpr ll INF = 1LL << 60;
template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}
template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}
ll safemod(ll A, ll M) {ll res = A % M; if (res < 0) res += M; return res;}
ll divfloor(ll A, ll B) {if (B < 0) A = -A, B = -B; return (A - safemod(A, B)) / B;}
ll divceil(ll A, ll B) {if (B < 0) A = -A, B = -B; return divfloor(A + B - 1, B);}
ll pow_ll(ll A, ll B) {if (A == 0 || A == 1) {return A;} if (A == -1) {return B & 1 ? -1 : 1;} ll res = 1; for (int i = 0; i < B; i++) {res *= A;} return res;}
ll logfloor(ll A, ll B) {assert(A >= 2); ll res = 0; for (ll tmp = 1; tmp <= B / A; tmp *= A) {res++;} return res;}
ll logceil(ll A, ll B) {assert(A >= 2); ll res = 0; for (ll tmp = 1; tmp < B; tmp *= A) {res++;} return res;}
ll arisum_ll(ll a, ll d, ll n) { return n * a + (n & 1 ? ((n - 1) >> 1) * n : (n >> 1) * (n - 1)) * d; }
ll arisum2_ll(ll a, ll l, ll n) { return n & 1 ? ((a + l) >> 1) * n : (n >> 1) * (a + l); }
ll arisum3_ll(ll a, ll l, ll d) { assert((l - a) % d == 0); return arisum2_ll(a, l, (l - a) / d + 1); }
template<class T> void unique(vector<T> &V) {V.erase(unique(V.begin(), V.end()), V.end());}
template<class T> void sortunique(vector<T> &V) {sort(V.begin(), V.end()); V.erase(unique(V.begin(), V.end()), V.end());}
#define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false)
template<class T> void printvec(const vector<T> &V) {int _n = V.size(); for (int i = 0; i < _n; i++) cout << V[i] << (i == _n - 1 ? "" : " ");cout << '\n';}
template<class T> void printvect(const vector<T> &V) {for (auto v : V) cout << v << '\n';}
template<class T> void printvec2(const vector<vector<T>> &V) {for (auto &v : V) printvec(v);}
//*
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
//using mint = modint1000000007;
//using mint = modint;
//*/

vector<ll> divisors(ll n)
{
  vector<ll> res;
  for (ll d = 1; d * d <= n; d++)
  {
    if (n % d == 0)
    {
      res.push_back(d);
      if (d != n / d)
        res.push_back(n / d);
    }
  }
  sort(res.begin(), res.end());
  return res;
}

int main()
{
  ll P, Q;
  cin >> P >> Q;
  ll g = gcd(P, Q);
  P /= g, Q /= g;

  if (P == 1 && Q == 1)
  {
    cout << 1 << endl;
    cout << "2 2" << endl;
    return 0;
  }

  vector<ll> D = divisors(Q);
  vector<pll> ans;
  for (auto n : D)
  {
    for (auto m : D)
    {
      ll p = n + m, q = n * m;
      g = gcd(p, q);
      p /= g, q /= g;
      if (p == P && q == Q)
        ans.push_back({n, m});
    }
  }

  sort(ans.begin(), ans.end());
  cout << ans.size() << endl;
  for (auto [n, m] : ans)
    cout << n << " " << m << endl;
}
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