結果
問題 | No.442 和と積 |
ユーザー |
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提出日時 | 2020-06-18 18:03:23 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,537 bytes |
コンパイル時間 | 1,711 ms |
コンパイル使用メモリ | 181,088 KB |
実行使用メモリ | 13,752 KB |
最終ジャッジ日時 | 2024-07-03 12:54:16 |
合計ジャッジ時間 | 4,763 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 17 TLE * 1 |
ソースコード
#include <bits/stdc++.h>using namespace std;typedef long long ll;#define rep(i, n) for(ll i = 0, i##_len = (n); i < i##_len; i++)#define reps(i, s, n) for(ll i = (s), i##_len = (n); i < i##_len; i++)#define rrep(i, n) for(ll i = (n) - 1; i >= 0; i--)#define rreps(i, e, n) for(ll i = (n) - 1; i >= (e); i--)#define all(x) (x).begin(), (x).end()#define rall(x) (x).rbegin(), (x).rend()#define sz(x) ((ll)(x).size())#define len(x) ((ll)(x).length())#define endl "\n"typedef unsigned long long ull;typedef long long ll;ull modmul(ull a, ull b, ull M) {ll ret = a * b - M * ull(1.L / M * a * b);return ret + M * (ret < 0) - M * (ret >= (ll)M);}ull modpow(ull b, ull e, ull mod) {ull ans = 1;for (; e; b = modmul(b, b, mod), e /= 2)if (e & 1) ans = modmul(ans, b, mod);return ans;}bool isPrime(ull n) {if (n < 2 || n % 6 % 4 != 1) return (n | 1) == 3;ull A[] = {2, 325, 9375, 28178, 450775, 9780504, 1795265022},s = __builtin_ctzll(n-1), d = n >> s;for (ull a : A) { // ^ count trailing zeroesull p = modpow(a%n, d, n), i = s;while (p != 1 && p != n - 1 && a % n && i--)p = modmul(p, p, n);if (p != n-1 && i != s) return 0;}return 1;}ull pollard(ull n) {auto f = [n](ull x) { return modmul(x, x, n) + 1; };ull x = 0, y = 0, t = 0, prd = 2, i = 1, q;while (t++ % 40 || __gcd(prd, n) == 1) {if (x == y) x = ++i, y = f(x);if ((q = modmul(prd, max(x,y) - min(x,y), n))) prd = q;x = f(x), y = f(f(y));}return __gcd(prd, n);}vector<ull> factor(ull n) {if (n == 1) return {};if (isPrime(n)) return {n};ull x = pollard(n);auto l = factor(x), r = factor(n / x);l.insert(l.end(), all(r));return l;}template<class T>map<T, int> factorize2(T n) {map<T, int> res;for (long long i = 2; (i * i) <= n; i++) {if (n % i) continue;res[i] = 0;while((n % i) == 0) {n /= i;res[i]++;}}if (n != 1) res[n] = 1;return res;}int main() {cin.tie(0);ios::sync_with_stdio(false);// ifstream in("input.txt");// cin.rdbuf(in.rdbuf());ll a, b;cin >> a >> b;map<ll, int> af = factorize2(a);map<ll, int> bf = factorize2(b);map<ll, int> pf = factorize2(a + b);map<ll, int> abf;for(auto x : af) abf[x.first] = x.second;for(auto x : bf) abf[x.first] += x.second;ll ans = 1;for(auto x : pf) {ll v = min(x.second, abf[x.first]);rep(i, v) ans *= x.first;}cout << ans << endl;return 0;}