結果

問題 No.2718 Best Consonance
ユーザー pitP
提出日時 2024-04-06 00:14:40
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 1,960 ms / 4,000 ms
コード長 2,532 bytes
コンパイル時間 4,806 ms
コンパイル使用メモリ 261,784 KB
最終ジャッジ日時 2025-02-20 22:16:16
ジャッジサーバーID
（参考情報） 		judge1 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 36
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
istream &operator>>(istream &is, modint &a) { long long v; is >> v; a = v; return is; }
ostream &operator<<(ostream &os, const modint &a) { return os << a.val(); }
istream &operator>>(istream &is, modint998244353 &a) { long long v; is >> v; a = v; return is; }
ostream &operator<<(ostream &os, const modint998244353 &a) { return os << a.val(); }
istream &operator>>(istream &is, modint1000000007 &a) { long long v; is >> v; a = v; return is; }
ostream &operator<<(ostream &os, const modint1000000007 &a) { return os << a.val(); } 
typedef long long ll;
typedef vector<vector<int>> Graph;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define FOR(i,l,r) for (int i = l;i < (int)(r); i++)
#define rep(i,n) for (int i = 0;i < (int)(n); i++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define my_sort(x) sort(x.begin(), x.end())
#define my_max(x) *max_element(all(x))
#define my_min(x) *min_element(all(x))
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
const int INF = (1<<30) - 1;
const ll LINF = (1LL<<62) - 1;
const int MOD = 998244353;
const int MOD2 = 1e9+7;
const double PI = acos(-1);
vector<int> di = {1,0,-1,0};
vector<int> dj = {0,1,0,-1};
#ifdef LOCAL
#  include <debug_print.hpp>
#  define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define debug(...) (static_cast<void>(0))
#endif
vector<ll> make_divisors(ll n){
    vector<ll> divisors;
    ll i = 1;
    while (i * i <= n){
        if (n % i == 0){
            divisors.push_back(i);
            if (i != (n/i)) divisors.push_back(n/i);
        }
        i++;
    }
    sort(all(divisors));
    return divisors;
}
const int M = 202020;
int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    int N; cin >> N;
    vector<ll> A(N), B(N);
    vector<pll> AB(N);
    rep(i,N) {
        cin >> A[i] >> B[i];
        AB[i] = make_pair(-A[i] * B[i], i);
    }
    sort(all(AB));
    vector<ll> C(M, LINF);
    ll ans = 0;
    rep(i,N){
        int idx = AB[i].second;
        auto gs = make_divisors(A[idx]);
        for(auto &g : gs){
            if(C[g] != LINF){
                ll lcm = A[idx] * C[g] / g;
                ans = max(ans, A[idx] * B[idx] / lcm);
            }
            C[g] = min(C[g], A[idx]);
        }
    }
    cout << ans << endl;
}
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