oj.uz

Submission #1061518

# Submission time Handle Problem Language Result Execution time Memory
1061518 2024-08-16T10:27:46 Z onbert Ancient Books (IOI17_books) C++17
22 / 100
 1012 ms 1048576 KB 
#include "books.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int maxn = 1e6 + 5, INF = 1e9;
int p[maxn];
int vis[maxn];
bool taken[maxn];

int minimum_walk(vector<int32_t> P, int32_t s) {
    int n = P.size();
    for (int i=0;i<n;i++) p[i] = P[i];
    for (int i=0;i<n;i++) vis[i] = 0;
    int ans = 0, cnt = 0;
    vector<pair<int,int>> vec = {{-1, -1}};
    for (int i=0;i<n;i++) if (!vis[i]) {
        if (p[i]==i && i==s) {
            cnt++;
            vis[i] = cnt;
            vec.push_back({s, s});
        }
        if (p[i]==i) continue;
        int u = i;
        pair<int,int> val = {u, u};
        cnt++;
        while (true) {
            vis[u] = cnt;
            val.first = min(u, val.first);
            val.second = max(u, val.second);
            int v = p[u];
            ans += abs(v-u);
            if (v==i) break;
            u = v;
        }
        vec.push_back(val);
    }

    sort(vec.begin(), vec.end());
    int lastl = vec[1].first, mx = vec[1].second;
    int LL = -1, RR = -1;
    bool done = false;
    for (int i=2;i<vec.size();i++) {
        if (vec[i].first > mx) {
            if (lastl<=s && s<=mx) {
                LL = lastl, RR = mx;
                assert(!done);
                done = true;
            }
            lastl = vec[i].first;
            ans += (vec[i].first - mx)*2;
        }
        mx = max(vec[i].second, mx);
    }
    if (LL==-1) LL = lastl, RR = mx;

    priority_queue<pair<int,int>, vector<pair<int,int>>, greater<pair<int,int>>> pq;
    pq.push({0, vis[s]});

    int dist[cnt+5];
    for (int i=1;i<=cnt;i++) dist[i] = -1;
    while (pq.size() > 0) {
        int u = pq.top().second, d = pq.top().first;
        pq.pop();
        if (vec[u].second < LL || vec[u].first > RR) dist[u] = -2;
        if (dist[u]!=-1) continue;
        dist[u] = d;
        for (int i=vec[u].first; i<=vec[u].second;i++) {
            if (p[i]!=i && dist[vis[i]]==-1) pq.push({d, vis[i]});
        }
        for (int i=vec[u].first-1;i>=LL;i--) {
            if (p[i]!=i) {
                if (dist[vis[i]]==-1) pq.push({d + (vec[u].first - i)*2, vis[i]});
            }
        }
        for (int i=vec[u].second+1;i<=RR;i++) {
            if (p[i]!=i) {
                if (dist[vis[i]]==-1) pq.push({d + (i - vec[u].first)*2, vis[i]});
            }
        }
    }
    int MX = 0;
    for (int i=1;i<=cnt;i++) if (dist[i]!=-1) MX = max(dist[i], MX);
    ans += MX;

    return ans;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int32_t)':
books.cpp:42:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for (int i=2;i<vec.size();i++) {
      |                  ~^~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 0 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 0 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 0 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 0 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4440 KB Output is correct
21 Correct 1 ms 4560 KB Output is correct
22 Correct 1 ms 4444 KB Output is correct
23 Correct 1 ms 4440 KB Output is correct
24 Correct 1 ms 4440 KB Output is correct
25 Correct 1 ms 4512 KB Output is correct
26 Correct 1 ms 4456 KB Output is correct
27 Correct 1 ms 4444 KB Output is correct
28 Correct 1 ms 4444 KB Output is correct
29 Correct 7 ms 5584 KB Output is correct

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 0 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 0 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4440 KB Output is correct
21 Correct 1 ms 4560 KB Output is correct
22 Correct 1 ms 4444 KB Output is correct
23 Correct 1 ms 4440 KB Output is correct
24 Correct 1 ms 4440 KB Output is correct
25 Correct 1 ms 4512 KB Output is correct
26 Correct 1 ms 4456 KB Output is correct
27 Correct 1 ms 4444 KB Output is correct
28 Correct 1 ms 4444 KB Output is correct
29 Correct 7 ms 5584 KB Output is correct
30 Correct 106 ms 29036 KB Output is correct
31 Correct 200 ms 42612 KB Output is correct
32 Correct 85 ms 24660 KB Output is correct
33 Correct 85 ms 29284 KB Output is correct
34 Correct 75 ms 30144 KB Output is correct
35 Correct 81 ms 30920 KB Output is correct
36 Correct 76 ms 30080 KB Output is correct
37 Correct 68 ms 25476 KB Output is correct
38 Correct 68 ms 24828 KB Output is correct
39 Correct 67 ms 24916 KB Output is correct
40 Correct 72 ms 24916 KB Output is correct
41 Correct 89 ms 25292 KB Output is correct
42 Correct 81 ms 24576 KB Output is correct
43 Runtime error 1012 ms 1048576 KB Execution killed with signal 9
44 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5076 KB Output is correct
2 Correct 5 ms 5080 KB Output is correct
3 Correct 8 ms 5588 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 8 ms 5588 KB Output is correct
7 Correct 8 ms 5588 KB Output is correct
8 Incorrect 15 ms 6608 KB 3rd lines differ - on the 1st token, expected: '10478', found: '10504'
9 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 0 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 0 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4440 KB Output is correct
21 Correct 1 ms 4560 KB Output is correct
22 Correct 1 ms 4444 KB Output is correct
23 Correct 1 ms 4440 KB Output is correct
24 Correct 1 ms 4440 KB Output is correct
25 Correct 1 ms 4512 KB Output is correct
26 Correct 1 ms 4456 KB Output is correct
27 Correct 1 ms 4444 KB Output is correct
28 Correct 1 ms 4444 KB Output is correct
29 Correct 7 ms 5584 KB Output is correct
30 Correct 106 ms 29036 KB Output is correct
31 Correct 200 ms 42612 KB Output is correct
32 Correct 85 ms 24660 KB Output is correct
33 Correct 85 ms 29284 KB Output is correct
34 Correct 75 ms 30144 KB Output is correct
35 Correct 81 ms 30920 KB Output is correct
36 Correct 76 ms 30080 KB Output is correct
37 Correct 68 ms 25476 KB Output is correct
38 Correct 68 ms 24828 KB Output is correct
39 Correct 67 ms 24916 KB Output is correct
40 Correct 72 ms 24916 KB Output is correct
41 Correct 89 ms 25292 KB Output is correct
42 Correct 81 ms 24576 KB Output is correct
43 Runtime error 1012 ms 1048576 KB Execution killed with signal 9
44 Halted 0 ms 0 KB -