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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#179280#5669. Traveling in Jade Cityarseny_y#WA 891ms50144kbC++236.4kb2023-09-14 20:13:432023-09-14 20:13:44

Judging History

你现在查看的是最新测评结果

  • [2023-09-14 20:13:44]
  • 评测
  • 测评结果:WA
  • 用时:891ms
  • 内存:50144kb
  • [2023-09-14 20:13:43]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

#define int long long

struct Fenwick {
    vector<int> t;

    Fenwick(int n) {
        t.resize(n + 1, 0);
    }

    void upd(int i, int add) {
        for (; i < t.size(); i += i & -i) t[i] += add;
    }

    int get(int len) {
        int ans = 0;
        for (; len > 0; len -= len & -len) ans += t[len];
        return ans;
    }

    int get(int l, int r) {
        return max(0LL, get(r) - get(l - 1));
    }
};

int inv(int x) {
    return x == 1 ? -1 : 1;
}

const int INF = INT_MAX * 100LL;

int32_t main() {
    int n, k, m, q;
    cin >> n >> k >> m >> q;
    Fenwick fenw_round(n);
    vector<int> pref_round(n + 1, 0), t_round(n + 1, 0);
    for (int i = 1, x; i <= n; ++i) {
        cin >> x;
        pref_round[i] = pref_round[i - 1] + x;
        fenw_round.upd(i, 1);
        t_round[i] = 1;
    }
    ++m;
    vector<int> pref_dick(m + 1), t_dick(n + 1);
    Fenwick fenw_dick(m);
    for (int i = 1, x; i <= m; ++i) {
        cin >> x;
        pref_dick[i] = pref_dick[i - 1] + x;
        fenw_dick.upd(i, 1);
        t_dick[i] = 1;
    }
    auto get_dist_1_k = [&]() -> int {
        int mn = INF;
        if (fenw_dick.get(1, m) == m) mn = min(mn, pref_dick[m]);
        if (fenw_round.get(1, k - 1) == k - 1) mn = min(mn, pref_round[k - 1]);
        if (fenw_round.get(k, n) == n - k + 1) mn = min(mn, pref_round[n] - pref_round[k - 1]);
        return mn;
    };
    auto check_in_round = [&](int v) -> bool {
        return v <= n;
    };
    auto dist_in_dick = [&](int u, int v) -> int {
        if (u > v) swap(u, v);
        return (fenw_dick.get(u, v - 1) == v - u ? pref_dick[v - 1] - pref_dick[u - 1] : INF);
    };
    int sm_in_round = pref_round[n];
    while (q--) {
        char s;
        cin >> s;
        if (s == 'q') {
            int u, v;
            cin >> u >> v;
            if (u > v) swap(u, v);
            if (u == v) {
                cout << "0\n";
                continue;
            }
            int dst1k = get_dist_1_k();
            int ans = INF;
            int distu1 = INF, distuk = INF, distv1 = INF, distvk = INF;
            if (check_in_round(u)) {
                if (fenw_round.get(1, u - 1) == u - 1) distu1 = min(distu1, pref_round[u - 1]);
                if (fenw_round.get(u, n) == n - u + 1) distu1 = min(distu1, sm_in_round - pref_round[u - 1]);
                if (u < k) {
                    if (fenw_round.get(u, k - 1) == k - u) distuk = min(distuk, pref_round[k - 1] - pref_round[u - 1]);
                    if (fenw_round.get(1, u - 1) + fenw_round.get(k, n) == n - (k - u)) distuk = min(distuk, sm_in_round - (pref_round[k - 1] - pref_round[u - 1]));
                } else {
                    swap(u, k);
                    if (fenw_round.get(u, k - 1) == k - u) distuk = min(distuk, pref_round[k - 1] - pref_round[u - 1]);
                    if (fenw_round.get(1, u - 1) + fenw_round.get(k, n) == n - (k - u)) distuk = min(distuk, sm_in_round - (pref_round[k - 1] - pref_round[u - 1]));
                    swap(u, k);
                }
            } else {
                u -= n, ++u;
                distu1 = min(distu1, dist_in_dick(1, u));
                int sm = fenw_dick.get(1, m);
                if (sm - fenw_dick.get(1, u - 1) == m + 1 - u) {
                    distuk = min(distuk, pref_dick[m] - pref_dick[u - 1]);
                }
                distuk = min(distuk, distu1 + dst1k);
                distu1 = min(distu1, distuk + dst1k);
                u += n, --u;
            }
            if (check_in_round(v)) {
                if (fenw_round.get(1, v - 1) == v - 1) distv1 = min(distv1, pref_round[v - 1]);
                if (fenw_round.get(v, n) == n - v + 1) distv1 = min(distv1, sm_in_round - pref_round[v - 1]);
                if (v < k) {
                    if (fenw_round.get(v, k - 1) == k - v) distvk = min(distvk, pref_round[k - 1] - pref_round[v - 1]);
                    if (fenw_round.get(1, v - 1) + fenw_round.get(k, n) == n - (k - v)) distvk = min(distvk, sm_in_round - (pref_round[k - 1] - pref_round[v - 1]));
                } else {
                    swap(v, k);
                    if (fenw_round.get(v, k - 1) == k - v) distvk = min(distvk, pref_round[k - 1] - pref_round[v - 1]);
                    if (fenw_round.get(1, v - 1) + fenw_round.get(k, n) == n - (k - v)) distvk = min(distvk, sm_in_round - (pref_round[k - 1] - pref_round[v - 1]));
                    swap(v, k);
                }
            } else {
                v -= n, ++v;
                distv1 = min(distv1, dist_in_dick(1, v));
                int sm = fenw_dick.get(1, m);
                if (sm - fenw_dick.get(1, v - 1) == m + 1 - v) {
                    distuk = min(distuk, pref_dick[m] - pref_dick[v - 1]);
                }
                distvk = min(distvk, distv1 + dst1k);
                distv1 = min(distv1, distvk + dst1k);
                v += n, --v;
            }
            for (int qq = 0; qq < 4; ++qq) {
                distu1 = min(distu1, distuk + dst1k);
                distv1 = min(distv1, distvk + dst1k);
                distuk = min(distuk, distu1 + dst1k);
                distvk = min(distvk, distv1 + dst1k);
            }
            ans = min(ans, min(distu1 + distv1, distvk+ distuk));
            ans = min(ans, min(distuk + distv1, distvk+ distu1) + dst1k);
            if (check_in_round(v)) {
                int len = v - u;
                if (fenw_round.get(u, v - 1) == len) ans = min(ans, pref_round[v - 1] - pref_round[u - 1]);
                if (fenw_round.get(1, u - 1) + fenw_round.get(v, n) == n - len) ans = min(ans, sm_in_round - (pref_round[v - 1] - pref_round[u - 1]));
            } else if (min(u, v) > n) {
                ans = min(ans, dist_in_dick(u - n, v - n));
            }
            cout << (ans == INF ? "impossible" : to_string(ans)) << "\n";
        } else if (s == 'c') {
            int x;
            cin >> x;
            if (t_round[x] == 1) {
                fenw_round.upd(x, -1);
            } else {
                fenw_round.upd(x, 1);
            }
            t_round[x] = inv(t_round[x]);
        } else {
            int x;
            cin >> x;
            ++x;
            if (t_dick[x] == 1) {
                fenw_dick.upd(x, -1);
            } else {
                fenw_dick.upd(x, 1);
            }
            t_dick[x] = inv(t_dick[x]);
        }
    }
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3804kb

input:

4 3 1 9
2 3 8 4
1 1
q 3 4
x 0
q 3 4
c 3
q 3 4
c 1
q 3 4
x 0
q 3 4

output:

6
8
9
impossible
6

result:

ok 5 lines

Test #2:

score: 0
Accepted
time: 0ms
memory: 3616kb

input:

4 3 1 9
2 3 8 4
1 1
q 3 4
x 0
q 3 4
c 3
q 3 4
c 1
q 3 4
x 0
q 3 4

output:

6
8
9
impossible
6

result:

ok 5 lines

Test #3:

score: -100
Wrong Answer
time: 891ms
memory: 50144kb

input:

1000000 999999 1000000 1000000
200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 2...

output:

177406400
144866800
181690600
200000600
impossible
impossible
impossible
200000600
200000600
200000600
200000600
200000600
29295200
200000600
22163200
200000600
200000600
200000600
11422200
200000600
62579800
200000600
164661200
impossible
20157200
200000600
200000600
200000600
impossible
200000600
...

result:

wrong answer 2nd lines differ - expected: '122264600', found: '144866800'