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답안 #928747

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
928747 2024-02-17T03:59:21 Z juliany2 Passport (JOI23_passport) C++17
46 / 100
 238 ms 43108 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(x) (x).begin(), (x).end()

template<class T> struct ST {
    static constexpr T ID = {{{(int) 1e9, 0}, {0, 0}}}; // or whatever ID
    inline T comb(T a, T b) { return {min(a[0], b[0]), max(a[1], b[1])}; } // or whatever function

    int sz;
    vector<T> t;

    void init(int _sz, T val = ID) {
        t.assign((sz = _sz) * 2, ID);
    }
    void init(vector<T> &v) {
        t.resize((sz = v.size()) * 2);
        for (int i = 0; i < sz; ++i)
            t[i + sz] = v[i];
        for (int i = sz - 1; i; --i)
            t[i] = comb(t[i * 2], t[(i * 2) | 1]);
    }
    void upd(int i, T x) {
        for (t[i += sz] = x; i > 1; i >>= 1)
            t[i >> 1] = comb(t[i], t[i ^ 1]);
    }
    T query(int l, int r) {
        T ql = ID, qr = ID;
        for (l += sz, r += sz + 1; l < r; l >>= 1, r >>= 1) {
            if (l & 1) ql = comb(ql, t[l++]);
            if (r & 1) qr = comb(t[--r], qr);
        }
        return comb(ql, qr);
    }
};

template<class T> struct ST_MN {
    static constexpr T ID = 1e9; // or whatever ID
    inline T comb(T a, T b) { return min(a, b); } // or whatever function

    int sz;
    vector<T> t;

    void init(int _sz, T val = ID) {
        t.assign((sz = _sz) * 2, ID);
    }
    void init(vector<T> &v) {
        t.resize((sz = v.size()) * 2);
        for (int i = 0; i < sz; ++i)
            t[i + sz] = v[i];
        for (int i = sz - 1; i; --i)
            t[i] = comb(t[i * 2], t[(i * 2) | 1]);
    }
    void upd(int i, T x) {
        for (t[i += sz] = x; i > 1; i >>= 1)
            t[i >> 1] = comb(t[i], t[i ^ 1]);
    }
    T query(int l, int r) {
        T ql = ID, qr = ID;
        for (l += sz, r += sz + 1; l < r; l >>= 1, r >>= 1) {
            if (l & 1) ql = comb(ql, t[l++]);
            if (r & 1) qr = comb(t[--r], qr);
        }
        return comb(ql, qr);
    }
};

const int N = 2e5 + 7, L = 20;
int n;
int l[N], r[N];
int lift[N][L][2];
int costl[N], costr[N], cost[N];

int bmin(int a, int b) {
    return (l[a] < l[b] ? a : b);
}

int bmax(int a, int b) {
    return (r[a] > r[b] ? a : b);
}

int main() {
    cin.tie(0)->sync_with_stdio(false);

    cin >> n;

    for (int i = 1; i <= n; i++)
        cin >> l[i] >> r[i];

    ST<array<array<int, 2>, 2>> st;
    st.init(n + 1);

    for (int i = 1; i <= n; i++)
        st.upd(i, {{{l[i], i}, {r[i], i}}});

    for (int i = 1; i <= n; i++) {
        lift[i][0][0] = st.query(l[i], r[i])[0][1];
        lift[i][0][1] = st.query(l[i], r[i])[1][1];
    }

    for (int j = 1; j < L; j++) {
        for (int i = 1; i <= n; i++) {
            lift[i][j][0] = bmin(lift[lift[i][j - 1][0]][j - 1][0], lift[lift[i][j - 1][1]][j - 1][0]);
            lift[i][j][1] = bmax(lift[lift[i][j - 1][0]][j - 1][1], lift[lift[i][j - 1][1]][j - 1][1]);
        }
    }

    for (int i = 1; i <= n; i++) {
        int cl = i, cr = i, cost = 0;
        for (int j = L - 1; ~j; j--) {
            int nl = bmin(lift[cl][j][0], lift[cr][j][0]), nr = bmax(lift[cl][j][1], lift[cr][j][1]);
            if (l[nl] != 1)
                cl = nl, cr = nr, cost += 1 << j;
        }

        costl[i] = cost + (l[cl] != 1);
    }

    for (int i = 1; i <= n; i++) {
        int cl = i, cr = i, cost = 0;
        for (int j = L - 1; ~j; j--) {
            int nl = bmin(lift[cl][j][0], lift[cr][j][0]), nr = bmax(lift[cl][j][1], lift[cr][j][1]);
            if (r[nr] != n)
                cl = nl, cr = nr, cost += 1 << j;
        }

        costr[i] = cost + (r[cr] != n);
    }

    ST_MN<int> cost;
    cost.init(n + 1);
    for (int i = 1; i <= n; i++)
        cost.upd(i, costl[i] + costr[i] + 1);

    int q;
    cin >> q;

    while (q--) {
        int x;
        cin >> x;

        int here = cost.query(x, x);

        if (here >= (1 << L)) {
            cout << -1 << '\n';
            continue;
        }

        auto val = [&](int rep) {
            int cl = x, cr = x;
            for (int j = 0; j < L; j++) {
                if (rep >> j & 1) {
                    int nl = bmin(lift[cl][j][0], lift[cr][j][0]), nr = bmax(lift[cl][j][1], lift[cr][j][1]);
                    cl = nl, cr = nr;
                }
            }

            return rep + cost.query(l[cl], r[cr]) + 1;
        };

        int lo = 0, hi = (1 << L) - 2;
        while (lo < hi) {
            int mid = (lo + hi) / 2;

            if (val(mid) < val(mid + 1))
                hi = mid;
            else
                lo = mid + 1;
        }

        cout << min(here, val(lo)) << '\n';
    }

    return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 238 ms 43108 KB Output is correct
5 Correct 184 ms 43088 KB Output is correct
6 Correct 187 ms 43092 KB Output is correct
7 Correct 133 ms 43088 KB Output is correct
8 Correct 117 ms 37200 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct

Subtask #3
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct

Subtask #4
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 1 ms 6488 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 8 ms 6492 KB Output is correct
28 Incorrect 9 ms 6504 KB Output isn't correct
29 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 238 ms 43108 KB Output is correct
5 Correct 184 ms 43088 KB Output is correct
6 Correct 187 ms 43092 KB Output is correct
7 Correct 133 ms 43088 KB Output is correct
8 Correct 117 ms 37200 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 1 ms 6492 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 1 ms 6492 KB Output is correct
22 Correct 1 ms 6492 KB Output is correct
23 Correct 1 ms 6492 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6492 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 2 ms 6492 KB Output is correct
30 Correct 2 ms 6492 KB Output is correct
31 Correct 2 ms 6492 KB Output is correct
32 Correct 2 ms 6492 KB Output is correct
33 Correct 1 ms 6488 KB Output is correct
34 Correct 1 ms 6492 KB Output is correct
35 Correct 8 ms 6492 KB Output is correct
36 Incorrect 9 ms 6504 KB Output isn't correct
37 Halted 0 ms 0 KB -