oj.uz

Submission #1061817

# Submission time Handle Problem Language Result Execution time Memory
1061817 2024-08-16T13:57:47 Z _8_8_ Ancient Books (IOI17_books) C++17
50 / 100
 75 ms 8192 KB 
#include "books.h"
#include <bits/stdc++.h>
    
using namespace std;
typedef long long ll;
const int N = 1e6 + 12;
int n;

long long minimum_walk(vector<int> p, int s) {
    n = (int)p.size();
    int it = 0;
    ll res = 0;
    for(int i = 0;i < n;i++) {
        res += abs(i - p[i]);
    }
    if(s == 0) {
        int nn = -1;
        for(int i = n - 1;i >= 0;i--) {
            if(p[i] != i) {
                nn = i;
                break;
            }
        }
        int mx = -1;
        for(int i = 0;i < nn;i++) {
            mx = max(mx,p[i]);
            if(mx == i) {
                res += 2;
            }
        }
        return res;
    }
    

    int l = s,r = s,R = s,L = s;
    int tl,tr;
    for(int i = 0;i < n;i++) {
        if(p[i] != i) {
            tl = i;
            break;
        }
    }
    for(int i = n - 1;i >= 0;i--) {
        if(i != p[i]) {
            tr = i;
            break;
        }
    }
    if(!res) {
        return res;
    }
    while(true) {
        R = max({R,p[r],p[l]});
        L = min({L,p[l],p[r]});
        if(l <= tl && r >= tr) {
            break;
        }
        if(r < R && tr >r) {
            r++;
        } else if(L < l && l >tl) {
            l--;
        } else {
            int l_ = -1e9,r_ = (int)1e9;
            for(int i = l - 1;i >= tl;i--) {
                if(p[i] > r) {
                    l_ = i;
                    break;
                }
            }
            for(int i = r + 1;i <= tr;i++) {
                if(p[i] < l) {
                    r_ = i;
                    break;
                }
            }
            if(l_ == (int)-1e9) {
                assert(r_ == (int)1e9);
                if(l > tl) {
                    res += 2;
                    l--;
                    int mn = (int)1e9;
                    for(int j = l;j >= tl;--j) {
                        mn = min(mn,p[j]);
                        if(j == mn) {
                            res += 2;
                        }
                    }
                }
                if(r < tr) {
                    res += 2;
                    r++;
                    int mx = -1;
                    for(int j = r;j <= tr;j++) {
                        mx = max(mx,p[j]);
                        if(mx == j) {
                            res += 2;
                        }
                    }
                }
                return res;
            } else {
                if(l - l_ <= r_ - r) {
                    res += 2;
                    l--;
                } else {
                    res += 2;
                    r++;
                }
            }
        }
    }
    return res;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:11:9: warning: unused variable 'it' [-Wunused-variable]
   11 |     int it = 0;
      |         ^~
books.cpp:36:12: warning: 'tr' may be used uninitialized in this function [-Wmaybe-uninitialized]
   36 |     int tl,tr;
      |            ^~
books.cpp:82:37: warning: 'tl' may be used uninitialized in this function [-Wmaybe-uninitialized]
   82 |                     for(int j = l;j >= tl;--j) {
      |                                   ~~^~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 64 ms 8020 KB Output is correct
31 Correct 64 ms 8176 KB Output is correct
32 Correct 62 ms 8184 KB Output is correct
33 Correct 63 ms 8016 KB Output is correct
34 Correct 75 ms 8172 KB Output is correct
35 Correct 65 ms 8192 KB Output is correct
36 Correct 64 ms 8020 KB Output is correct
37 Correct 62 ms 8020 KB Output is correct
38 Correct 63 ms 8192 KB Output is correct
39 Correct 73 ms 8192 KB Output is correct
40 Correct 63 ms 8016 KB Output is correct
41 Correct 63 ms 8192 KB Output is correct
42 Correct 66 ms 8176 KB Output is correct
43 Correct 62 ms 8016 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 424 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '2094', found: '2098'
5 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 64 ms 8020 KB Output is correct
31 Correct 64 ms 8176 KB Output is correct
32 Correct 62 ms 8184 KB Output is correct
33 Correct 63 ms 8016 KB Output is correct
34 Correct 75 ms 8172 KB Output is correct
35 Correct 65 ms 8192 KB Output is correct
36 Correct 64 ms 8020 KB Output is correct
37 Correct 62 ms 8020 KB Output is correct
38 Correct 63 ms 8192 KB Output is correct
39 Correct 73 ms 8192 KB Output is correct
40 Correct 63 ms 8016 KB Output is correct
41 Correct 63 ms 8192 KB Output is correct
42 Correct 66 ms 8176 KB Output is correct
43 Correct 62 ms 8016 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 0 ms 424 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '2094', found: '2098'
48 Halted 0 ms 0 KB -