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
#130695	#2789. Sorting	Qwerty1232^#	8	979ms	4060kb	C++20	2.5kb	2023-07-24 19:51:49	2024-07-04 00:55:27

Judging History

你现在查看的是最新测评结果

[2024-07-04 00:55:27]
评测

测评结果：8
用时：979ms
内存：4060kb

查看

[2023-08-10 23:21:45]
System Update: QOJ starts to keep a history of the judgings of all the submissions.

[2023-07-24 19:51:49]
提交

answer

#include "sorting.h"

#include <bits/stdc++.h>

int findSwapPairs(int n, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    if (0 && std::all_of(X, X + M, [&](int a) { return a == 0; }) && std::all_of(Y, Y + M, [&](int a) { return a == 0; })) {
        std::vector<std::pair<int, int>> ans;

        std::vector<int> used(n);
        for (int i = 0; i < n; i++) {
            if (!used[i]) {
                int u = i;
                do {
                    int t = S[u];
                    used[u] = true;
                    if (t != i) {
                        ans.push_back({i, t});
                    }
                    u = t;
                    assert(ans.size() < M);
                } while (u != i);
            }
        }

        for (int i = 0; i < ans.size(); i++) {
            P[i] = ans[i].first;
            Q[i] = ans[i].second;
        }
        return ans.size();
    }

    auto cum = [&](std::vector<std::pair<int, int>> ans) {
        int m = ans.size();
        std::vector<int> p(S, S + n);
        for (int i = 0; i < m; i++) {
            std::swap(p[X[i]], p[Y[i]]);
            std::swap(p[ans[i].first], p[ans[i].second]);
        }
        std::vector<bool> used(n);
        int cnt = 0;
        for (int i = 0; i < n; i++) {
            if (!used[i]) {
                int u = i;
                do {
                    used[u] = true;
                    u = p[u];
                } while (u != i);
                cnt++;
            }
        }
        return cnt;
    };

    static std::mt19937 rnd;

    for (int iter = 0;; iter++) {
        int m = std::min(M, 4 * n);
        std::vector<std::pair<int, int>> ans(m);
        for (int i = 0; i < m; i++) {
            ans[i] = {rnd() % n, rnd() % n};
        }
        int sc = cum(ans);
        // while (sc < n) {
        for (int f = 0; f < 1e6; f++) {
            int i = rnd() % m;
            std::pair<int, int> pr = {rnd() % n, rnd() % n};
            std::swap(ans[i], pr);
            int sc2 = cum(ans);
            if (sc2 >= sc) {
                if (sc2 > sc) {
                    std::cerr << sc2 << "\n";
                }
                sc = sc2;
            } else {
                std::swap(ans[i], pr);
            }
        }

        if (sc == n) {
            for (int i = 0; i < ans.size(); i++) {
                P[i] = ans[i].first;
                Q[i] = ans[i].second;
            }
            return ans.size();
        }
    }
}

源文件, 语言: C++20

详细

Subtask #1:

score: 8

Accepted

Test #1:

score: 8

Accepted

time: 49ms

memory: 3988kb

input:

output:

1
0 0

result:

ok correct

Test #2:

score: 0

Accepted

time: 67ms

memory: 3712kb

input:

output:

result:

ok correct

Test #3:

score: 0

Accepted

time: 68ms

memory: 3736kb

input:

output:

result:

ok correct

Test #4:

score: 0

Accepted

time: 80ms

memory: 3708kb

input:

output:

result:

ok correct

Test #5:

score: 0

Accepted

time: 112ms

memory: 3704kb

input:

output:

result:

ok correct

Test #6:

score: 0

Accepted

time: 118ms

memory: 4060kb

input:

output:

result:

ok correct

Test #7:

score: 0

Accepted

time: 118ms

memory: 3784kb

input:

output:

result:

ok correct

Subtask #2:

score: 0

Time Limit Exceeded

Test #8:

score: 12

Accepted

time: 62ms

memory: 3736kb

input:

output:

result:

ok correct

Test #9:

score: 0

Accepted

time: 75ms

memory: 3784kb

input:

output:

result:

ok correct

Test #10:

score: -12

Time Limit Exceeded

input:

98
82 70 31 12 27 51 84 90 66 8 49 52 74 91 46 7 96 67 63 85 34 50 87 83 58 78 26 39 77 48 2 55 94 25 61 56 53 13 32 86 72 20 37 73 9 93 65 28 18 11 71 59 88 35 76 40 24 36 33 3 17 29 38 5 21 15 79 30 62 92 45 80 64 95 43 75 97 23 16 57 22 60 41 69 0 42 14 10 47 68 19 4 1 6 44 81 54 89
2940
0 0
0 0
...

output:

result:

Subtask #3:

score: 0

Time Limit Exceeded

Test #13:

score: 16

Accepted

time: 76ms

memory: 3660kb

input:

output:

result:

ok correct

Test #14:

score: 0

Accepted

time: 123ms

memory: 3792kb

input:

output:

result:

ok correct

Test #15:

score: 0

Accepted

time: 979ms

memory: 3768kb

input:

96
7 15 12 95 11 50 20 42 81 29 58 80 56 71 63 66 44 6 64 39 2 22 73 1 24 27 69 28 45 25 60 61 5 94 14 65 9 86 68 32 79 37 3 57 34 35 10 88 76 78 21 93 19 53 84 52 4 33 38 55 62 67 77 41 31 48 91 49 51 43 90 8 87 54 16 17 70 46 85 0 75 92 74 47 36 89 30 13 59 26 40 18 82 83 72 23
2880
0 1
0 1
0 1
0 ...

output:

result:

ok correct

Test #16:

score: -16

Time Limit Exceeded

input:

99
28 2 16 95 73 6 30 90 18 46 82 69 59 4 40 49 33 29 66 86 97 56 22 96 38 35 67 15 83 44 36 72 81 41 76 47 34 87 65 9 92 57 0 55 68 5 32 17 61 50 14 19 58 24 98 48 53 60 45 12 39 3 8 74 88 77 13 85 84 42 79 51 94 70 10 25 75 31 62 27 64 1 80 78 21 37 7 63 52 23 71 20 54 26 43 91 89 93 11
2970
0 1
0...

output:

result:

Subtask #4:

score: 0

Skipped

Dependency #2:

Subtask #5:

score: 0

Time Limit Exceeded

Test #28:

score: 0

Time Limit Exceeded

input:

1800
530 1775 466 953 230 1179 944 752 990 1316 275 1029 158 152 1673 1706 172 115 599 1661 131 699 1112 454 551 1059 291 495 28 67 773 480 839 462 1210 757 879 285 439 3 1429 820 26 1023 942 199 356 625 1705 1421 144 1529 716 7 1485 1027 1599 696 517 1353 456 1389 273 1363 1414 1177 718 41 777 1621...

output:

Unauthorized output

QOJ.ac

QOJ

Judging History

answer

详细

Subtask #1:

Test #1:

input:

output:

result:

Test #2:

input:

output:

result:

Test #3:

input:

output:

result:

Test #4:

input:

output:

result:

Test #5:

input:

output:

result:

Test #6:

input:

output:

result:

Test #7:

input:

output:

result:

Subtask #2:

Test #8:

input:

output:

result:

Test #9:

input:

output:

result:

Test #10:

input:

output:

result:

Subtask #3:

Test #13:

input:

output:

result:

Test #14:

input:

output:

result:

Test #15:

input:

output:

result:

Test #16:

input:

output:

result:

Subtask #4:

Dependency #2:

Subtask #5:

Test #28:

input:

output:

result:

Subtask #6:

Dependency #5: