結果

問題 No.3250 最小公倍数
コンテスト
ユーザー jiangxinyang
提出日時 2025-08-04 21:16:06
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
WA  
(最新)
AC  
(最初)
実行時間 -
コード長 3,348 bytes
コンパイル時間 1,961 ms
コンパイル使用メモリ 207,680 KB
実行使用メモリ 65,224 KB
最終ジャッジ日時 2025-10-16 16:06:21
合計ジャッジ時間 4,435 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge5
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 WA * 1
other WA * 22
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:119:12: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  119 |     freopen("lcm.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
main.cpp:120:12: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  120 |     freopen("lcm.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
main.cpp:122:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  122 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
main.cpp:123:39: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  123 |     for (int i = 1; i <= n; i++) scanf("%lld", &a[i]);
      |                                  ~~~~~^~~~~~~~~~~~~~~
main.cpp:126:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  126 |         scanf("%d%d", &u, &v);
      |         ~~~~~^~~~~~~~~~~~~~~~

ソースコード

diff # 

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll mod = 998244353;
const int N = 500005;
const int INF = 0x3f3f3f3f;
ll a[N];
ll powmod(ll x, ll y, ll mod) {
    ll res = 1;
    while (y) {
        if (y & 1) res = res * x % mod;
        y >>= 1;
        x = x * x % mod;
    }
    return res;
}
bool Mr(ll n) {
    if (n == 2) return true;
    if (n <= 1 || n % 2 == 0) return false;
    ll base[7] = {2, 325, 9375, 28178, 450775, 9780504, 1795265022};
    ll u = n - 1, k = 0;
    while (u % 2 == 0) u /= 2, k++;
    for (auto x : base) {
        if (x % n == 0) continue;
        ll v = powmod(x, u, n);
        if (v == 1 || v == n - 1) continue;
        for (int j = 1; j <= k; j++) {
            ll last = v;
            v = (ll)v * v % n;
            if (v == 1) {
                if (last != n - 1) return false;
                break;
            }
        }
        if (v != 1) return false;
    }
    return true;
}
ll pr(ll n) {
    static mt19937_64 sj(chrono::steady_clock::now().time_since_epoch().count());
    uniform_int_distribution<ll> u0(1, n - 1);
    ll c = u0(sj);
    auto f = [&](ll x) { return ((ll)x * x + c) % n; };
    ll x = 0, y = 0, s = 1;
    for (int k = 1;; k <<= 1, y = x, s = 1) {
        for (int i = 1; i <= k; i++) {
            x = f(x);
            s = (ll)s * abs(x - y) % n;
            if (i % 127 == 0) {
                ll d = __gcd(s, n);
                if (d > 1) return d;
            }
        }
        ll d = __gcd(s, n);
        if (d > 1) return d;
    }
    return n;
}
void get_factor(ll n, unordered_map<ll, int>& mp) {
    if (n == 1) return;
    if (Mr(n)) {
        mp[n]++;
        return;
    }
    ll x = n;
    while (x == n) x = pr(x);
    get_factor(x, mp);
    get_factor(n / x, mp);
}
vector<int> G[N], H[N];
int fa[N];
ll ans[N];
unordered_map<ll, int>* mp2[N];
unordered_map<ll, int> mp[N];
int sz[N], son[N];
void dfs1(int u, int fa) {
    sz[u] = 1;
    int mx = 0;
    for (auto v : G[u]) {
        if (v != fa) {
            dfs1(v, u);
            sz[u] += sz[v];
            if (sz[v] > mx) {
                mx = sz[v];
                son[u] = v;
            }
        }
    }
}

void dfs2(int u, int fa) {
    for (auto v : G[u]) {
        if (v != fa && v != son[u]) {
            dfs2(v, u);
        }
    }
    if (son[u]) {
        dfs2(son[u], u);
        mp2[u] = mp2[son[u]];
    } else {
        mp2[u] = new unordered_map<ll, int>();
    }
    for (auto v : G[u]) {
        if (v != fa && v != son[u]) {
            for (auto [x, y] : *mp2[v]) {
                if ((*mp2[u])[x] < y) (*mp2[u])[x] = y;
            }
            delete mp2[v];
        }
    }
    for (auto [x, y] : mp[u]) {
        if ((*mp2[u])[x] < y) (*mp2[u])[x] = y;
    }
    ll res = 1;
    for (auto [x, y] : *mp2[u]) res = res * powmod(x, y, mod) % mod;
    ans[u] = res;
}
int main() {
    freopen("lcm.in", "r", stdin);
    freopen("lcm.out", "w", stdout);
    int n;
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) scanf("%lld", &a[i]);
    for (int i = 1; i < n; i++) {
        int u, v;
        scanf("%d%d", &u, &v);
        G[u].push_back(v);
        G[v].push_back(u);
    }
    for (int i = 1; i <= n; i++) get_factor(a[i], mp[i]);
    dfs1(1, 0);
    dfs2(1, 0);
    for (int i = 1; i <= n; i++) printf("%lld\n", ans[i]);
    return 0;
}
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