제출 #1346160

#제출 시각아이디문제언어결과실행 시간메모리
1346160JahonaliXZoltan (COCI16_zoltan)C++20
14 / 140
170 ms23752 KiB
#include <bits/stdc++.h>

using namespace std;

#define int long long
constexpr int mod = 1e9 + 7, inf = 1e17;


struct node { int mx, cnt; };

node merge(node left, node right) {
    if (left.mx > right.mx) return left;
    if (right.mx > left.mx) return right;
    return {left.mx, (left.cnt + right.cnt) % mod};
}

struct segment_tree {
    int n;
    vector<node> t;
    segment_tree(int n) : n(n), t(n << 2) {}
    void update(int i, int dp, int cn, int v = 1, int l = 0, int r = -1) {
        if (r < 0) r += n;
        if (l == r) t[v] = merge(t[v], {dp, cn});
        else {
            int m = (l + r) >> 1;
            if (i <= m) update(i, dp, cn, v << 1, l, m);
            else update(i, dp, cn, v << 1 | 1, m + 1, r);
            t[v] = merge(t[v << 1], t[v << 1 | 1]);
        }
    }
    node get(int L, int R, int v = 1, int l = 0, int r = -1) {
        if (L > R) return {0, 0};
        if (r < 0) r += n;
        if (L <= l && r <= R) return t[v];
        int m = (l + r) >> 1;
        if (R <= m) return get(L, R, v << 1, l, m);
        if (L > m) return get(L, R, v << 1 | 1, m + 1, r);
        return merge(get(L, R, v << 1, l, m), get(L, R, v << 1 | 1, m + 1, r));
    }
};

int32_t main() {
#ifdef JahonaliX
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n, m;
    cin >> n;
    vector<int> a(n), b;
    for (int &i : a) cin >> i;
    b = a;
    reverse(a.begin(), a.end());
    for (int i = 1; i < n; ++i) a.emplace_back(b[i]);
    sort(b.begin(), b.end()), b.erase(unique(b.begin(), b.end()), b.end()), m = b.size();
    for (int &i : a) i = lower_bound(b.begin(), b.end(), i) - b.begin();
    segment_tree s(m);
    n = n * 2 - 1;
    vector<int> dp(n, 1), cnt(n, 1);
    for (int i = 0; i < n; ++i) {
        auto p = s.get(0, a[i] - 1);
        if (p.mx == 0) {
            s.update(a[i], dp[i] + 1, cnt[i]);
            continue;
        }
        dp[i] = p.mx, cnt[i] = p.cnt;
        s.update(a[i], dp[i] + 1, cnt[i]);
    }
    int ans = 0, cn = 0;
    for (int i = n / 2 + 1; i < n; ++i) {
        if (dp[i] > ans) ans = dp[i], cn = cnt[i];
        else cn += cnt[i], cn %= mod;
    }
    n++, n /= 2;
    for (int i = ans; i < n; ++i) cn *= 2, cn %= mod;
    cout << ans << ' ' << cn;
    return 0;
}
#Verdict Execution timeMemoryGrader output
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