#748647 (C++14) No.1884 Sequence

• 問題: No.1884 Sequence
• ユーザー: Novi
• 提出日時: 2022-03-25 22:08:52
• 言語: C++14 (gcc 13.3.0 + boost 1.87.0)
• 結果: WA
• 実行時間: -
• コード長: 2,827 bytes
• コンパイル時間: 4,105 ms
• コンパイル使用メモリ: 239,104 KB
• 実行使用メモリ: 17,568 KB
• 最終ジャッジ日時: 2024-10-14 06:03:26
• 合計ジャッジ時間: 12,700 ms
• ジャッジサーバーID （参考情報）: judge2 / judge5

ファイルパターン	結果
sample	AC * 3
other	AC * 36 WA * 2 TLE * 2

ソースコード

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#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define int ll
#define rng(i, a, b) for (int i = int(a); i < int(b); i++)
#define rep(i, b) rng(i, 0, b)
#define ALL(a) (a).begin(), (a).end()
template <class t, class u> void chmax(t& a, u b) {
    if (a < b) a = b;
}
template <class t, class u> void chmin(t& a, u b) {
    if (b < a) a = b;
}
template <class t> using vc = vector<t>;
template <class t> using vvc = vc<vc<t>>;
using pi = pair<int, int>;
using vi = vc<int>;
using uint = unsigned;
using ull = unsigned long long;
int popcount(signed t) { return __builtin_popcount(t); }
int popcount(ll t) { return __builtin_popcountll(t); }
bool ispow2(int i) { return i && (i & -i) == i; }
ll mask(int i) { return (ll(1) << i) - 1; }
int lcm(int a, int b) { return a / __gcd(a, b) * b; }
vector<int> enum_divisors(int N) {
    vector<long long> res;
    for (long long i = 1; i * i <= N; ++i) {
        if (N % i == 0) {
            res.push_back(i);
            if (N / i != i) res.push_back(N / i);
        }
    }
    sort(res.begin(), res.end());
    return res;
}
signed main() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    cout << fixed << setprecision(20);
    int n;
    cin >> n;
    vc<int> a(n);
    set<int> prime;
    rep(i, n) cin >> a[i];
    set<int> elem;
    rep(i, n) elem.insert(a[i]);
    if (elem.size() <= 2) {
        cout << "Yes" << endl;
        return 0;
    }
    // dを全探索したい
    int cnt = 0;
    vc<int> b;
    rep(i, n) {
        if (a[i] == 0)
            cnt++;
        else {
            b.emplace_back(a[i]);
        }
    }
    vc<int> ma = b;
    sort(ALL(ma));
    if (cnt == 0) {
        bool ok = true;
        int x = ma[1] - ma[0];
        rep(i, n - 1) if (ma[i + 1] - ma[i] != x) ok = false;
        if (ok) {
            cout << "Yes" << endl;
        } else {
            cout << "No" << endl;
        }
        return 0;
    }
    bool same = false;
    rep(i, ma.size() - 1) {
        if (ma[i] == ma[i + 1]) same = true;
    }
    if (same) {
        rep(i, ma.size() - 1) {
            if (ma[i] != ma[i + 1]) {
                cout << "No" << endl;
                return 0;
            }
        }
    }
    int gd = ma[1] - ma[0];
    for (int i = 0; i < b.size() - 1; i++) {
        int diff = ma[i + 1] - ma[i];
        gd = __gcd(gd, diff);
    }
    int l = b.size();
    for (auto v : enum_divisors(gd)) {
        int tmp = 0;
        bool f = true;
        for (int i = 0; i < l - 1; i++) {
            int diff = ma[i + 1] - ma[i];
            if (diff % v != 0) {
                f = false;
            } else {
                tmp += diff / v - 1;
            }
        }
        if (f && tmp <= cnt) {
            cout << "Yes" << endl;
            return 0;
        }
    }
    cout << "No" << endl;
}
 
 
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