Submission #677703

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
677703	2023-01-04T07:57:58 Z	bashkort	Ancient Books (IOI17_books)	C++17	50 / 100	177 ms	30804 KB

books

#include <bits/stdc++.h>
#include "books.h"

using namespace std;
using ll = long long;

long long minimum_walk(std::vector<int> p, int s) {
    if (is_sorted(p.begin(), p.end())) {
        return 0;
    }

    int n = p.size();

    ll ans = 0;

    vector<int> inv(n);
    for (int i = 0; i < n; ++i) {
        inv[p[i]] = i;

        ans += abs(p[i] - i);
    }

    vector<int> lx(n, -1), rx(n, -1);
    for (int i = 0; i < n; ++i) {
        if (lx[i] == -1) {
            int v = i, mn = n, mx = 0;

            vector<int> cycle;
            do {
                mn = min(mn, v);
                mx = max(mx, v);

                lx[v] = 228;
                cycle.push_back(v);

                v = p[v];
            } while (lx[v] == -1);

            for (int x: cycle) {
                lx[x] = mn, rx[x] = mx;
            }
        }
    }

    auto extend = [&](int &l, int &r) {
        int mn = l, mx = r;
        for (int i = l; i <= r; ++i) {
            mn = min(mn, lx[i]);
            mx = max(mx, rx[i]);
        }
        l = mn, r = mx;
    };

    int trivL = 0, trivR = n - 1;
    while (p[trivL] == trivL) {
        trivL += 1;
    }
    while (p[trivR] == trivR) {
        trivR -= 1;
    }

    int l = lx[s], r = rx[s];
    extend(l, r);
    while (l >= 0 && r < n) {
        int cl = l, cr = r;

        int ansL = 0, ansR = 0;
        int mn = n;

        bool found = false;
        while (cl > 0) {
            cl -= 1;
            if (mn > cl) {
                ansL += 1;
            }
            mn = min(mn, p[cl]);
            if (rx[cl] > r) {
                found = true;
                break;
            }
        }

        int mx = 0;

        while (cr < n - 1) {
            cr += 1;
            if (mx < cr) {
                ansR += 1;
            }
            mx = max(mx, p[cr]);
            if (lx[cr] < l) {
                found = true;
                break;
            }
        }

        if (!found) {
            if (trivL < l) {
                ans += (ansL - trivL) * 2;
            }
            if (trivR > r) {
                ans += (ansR - (n - trivR - 1)) * 2;
            }
            break;
        }

        ans += min(ansL, ansR);
        l = min(lx[cl], lx[cr]);
        r = max(rx[cr], rx[cr]);
        extend(l, r);
    }

    return ans;
}

Subtask #1
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	1 ms	304 KB	Output is correct
21	Correct	0 ms	300 KB	Output is correct
22	Correct	0 ms	296 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	0 ms	212 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	296 KB	Output is correct
27	Correct	1 ms	300 KB	Output is correct
28	Correct	1 ms	212 KB	Output is correct
29	Correct	1 ms	212 KB	Output is correct

Subtask #3
28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	1 ms	304 KB	Output is correct
21	Correct	0 ms	300 KB	Output is correct
22	Correct	0 ms	296 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	0 ms	212 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	296 KB	Output is correct
27	Correct	1 ms	300 KB	Output is correct
28	Correct	1 ms	212 KB	Output is correct
29	Correct	1 ms	212 KB	Output is correct
30	Correct	177 ms	30804 KB	Output is correct
31	Correct	160 ms	28784 KB	Output is correct
32	Correct	86 ms	14816 KB	Output is correct
33	Correct	126 ms	26612 KB	Output is correct
34	Correct	140 ms	26608 KB	Output is correct
35	Correct	143 ms	26728 KB	Output is correct
36	Correct	120 ms	26612 KB	Output is correct
37	Correct	126 ms	26628 KB	Output is correct
38	Correct	106 ms	26584 KB	Output is correct
39	Correct	103 ms	26676 KB	Output is correct
40	Correct	105 ms	26920 KB	Output is correct
41	Correct	134 ms	29600 KB	Output is correct
42	Correct	124 ms	28176 KB	Output is correct
43	Correct	123 ms	26600 KB	Output is correct

Subtask #4
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	212 KB	3rd lines differ - on the 1st token, expected: '3304', found: '3024'
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	0 ms	212 KB	Output is correct
11	Correct	0 ms	212 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	1 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	1 ms	304 KB	Output is correct
21	Correct	0 ms	300 KB	Output is correct
22	Correct	0 ms	296 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	0 ms	212 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	296 KB	Output is correct
27	Correct	1 ms	300 KB	Output is correct
28	Correct	1 ms	212 KB	Output is correct
29	Correct	1 ms	212 KB	Output is correct
30	Correct	177 ms	30804 KB	Output is correct
31	Correct	160 ms	28784 KB	Output is correct
32	Correct	86 ms	14816 KB	Output is correct
33	Correct	126 ms	26612 KB	Output is correct
34	Correct	140 ms	26608 KB	Output is correct
35	Correct	143 ms	26728 KB	Output is correct
36	Correct	120 ms	26612 KB	Output is correct
37	Correct	126 ms	26628 KB	Output is correct
38	Correct	106 ms	26584 KB	Output is correct
39	Correct	103 ms	26676 KB	Output is correct
40	Correct	105 ms	26920 KB	Output is correct
41	Correct	134 ms	29600 KB	Output is correct
42	Correct	124 ms	28176 KB	Output is correct
43	Correct	123 ms	26600 KB	Output is correct
44	Incorrect	0 ms	212 KB	3rd lines differ - on the 1st token, expected: '3304', found: '3024'
45	Halted	0 ms	0 KB	-

Submission #677703

Compilation message

Subtask #1 12.0 / 12.0

Subtask #2 10.0 / 10.0

Subtask #3 28.0 / 28.0

Subtask #4 0 / 20.0

Subtask #5 0 / 30.0

Subtask #1
12.0 / 12.0

Subtask #2
10.0 / 10.0

Subtask #3
28.0 / 28.0

Subtask #4
0 / 20.0

Subtask #5
0 / 30.0