QOJ.ac

QOJ

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
#179351#5669. Traveling in Jade Cityarseny_y#WA 926ms49984kbC++236.8kb2023-09-14 20:47:372023-09-14 20:47:37

Judging History

你现在查看的是最新测评结果

  • [2023-09-14 20:47:37]
  • 评测
  • 测评结果:WA
  • 用时:926ms
  • 内存:49984kb
  • [2023-09-14 20:47:37]
  • 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(m + 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);
                }
            }
            if (u == 1 || u == k || u > n){
                bool ch =false;
                if (u > n) {
                    u -= n, ++u;
                    ch =true;
                }
                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);
                if (ch) {
                    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);
                }
            }if (v == 1 || v == k || v > n) {
                bool ch = false;
                if (v > n) {
                    v -= n, ++v;
                    ch = true;
                }
                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) {
                    distvk = min(distvk, pref_dick[m] - pref_dick[v - 1]);
                }
                distvk = min(distvk, distv1 + dst1k);
                distv1 = min(distv1, distvk + dst1k);
                if (ch) {
                    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: 3476kb

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: 3732kb

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: 0
Accepted
time: 926ms
memory: 49984kb

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
122264600
70328400
impossible
impossible
impossible
impossible
impossible
impossible
impossible
impossible
impossible
29295200
impossible
22163200
impossible
impossible
impossible
11422200
impossible
62579800
impossible
35339400
impossible
20157200
impossible
impossible
impossible
impossib...

result:

ok 500003 lines

Test #4:

score: -100
Wrong Answer
time: 628ms
memory: 17076kb

input:

100000 25123 500000 1000000
200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 ...

output:

4243800
37968200
35427000
52078200
5074200
70821200
13901400
13614600
8774800
68958800
49822200
31077400
impossible
45392400
48946000
76885400
37532600
34416200
impossible
20744200
71652000
21288000
7501600
70315400
14721800
impossible
12981800
81039600
9506800
impossible
33487200
53520200
impossibl...

result:

wrong answer 414735th lines differ - expected: '200', found: 'impossible'