Submission #1061830

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1061830	2024-08-16T14:06:45 Z	_8_8_	Ancient Books (IOI17_books)	C++17	50 / 100	83 ms	8192 KB

books

#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) {
            assert(R < tr);
            r++;
        } else if(L < l) {
            assert(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) {
                        assert(p[j] <= l && p[j] >= tl);
                        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++) {
                        assert(p[j] >= r && p[j] <= tr);
                        mx = max(mx,p[j]);
                        if(mx == j) {
                            res += 2;
                        }
                    }
                }
                return res;
            } else {
                if(l - l_ <= r_ - r) {
                    res += 2;
                    for(int j = l;j >= l_;j--) {
                        L = min(L,p[j]);
                        R = max(R,p[j]);
                    }
                    l = l_;
                } else {
                    res += 2;
                    for(int j = r;j <= r_;j++) {
                        L = min(L,p[j]);
                        R = max(R,p[j]);
                    }
                    r = 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;
      |         ^~

Subtask #1
12.0 / 12.0

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

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 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	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 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	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	344 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	344 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	344 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	1 ms	344 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	0 ms	344 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct

Subtask #3
28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 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	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 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	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	344 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	344 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	344 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	1 ms	344 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	0 ms	344 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	79 ms	8188 KB	Output is correct
31	Correct	71 ms	8188 KB	Output is correct
32	Correct	66 ms	8016 KB	Output is correct
33	Correct	63 ms	8192 KB	Output is correct
34	Correct	63 ms	8020 KB	Output is correct
35	Correct	63 ms	8188 KB	Output is correct
36	Correct	64 ms	8016 KB	Output is correct
37	Correct	65 ms	8016 KB	Output is correct
38	Correct	62 ms	8020 KB	Output is correct
39	Correct	69 ms	8016 KB	Output is correct
40	Correct	62 ms	8016 KB	Output is correct
41	Correct	83 ms	8176 KB	Output is correct
42	Correct	66 ms	8020 KB	Output is correct
43	Correct	63 ms	8188 KB	Output is correct

Subtask #4
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Runtime error	1 ms	600 KB	Execution killed with signal 6
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 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	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 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	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	344 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	344 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	344 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	1 ms	344 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	0 ms	344 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	79 ms	8188 KB	Output is correct
31	Correct	71 ms	8188 KB	Output is correct
32	Correct	66 ms	8016 KB	Output is correct
33	Correct	63 ms	8192 KB	Output is correct
34	Correct	63 ms	8020 KB	Output is correct
35	Correct	63 ms	8188 KB	Output is correct
36	Correct	64 ms	8016 KB	Output is correct
37	Correct	65 ms	8016 KB	Output is correct
38	Correct	62 ms	8020 KB	Output is correct
39	Correct	69 ms	8016 KB	Output is correct
40	Correct	62 ms	8016 KB	Output is correct
41	Correct	83 ms	8176 KB	Output is correct
42	Correct	66 ms	8020 KB	Output is correct
43	Correct	63 ms	8188 KB	Output is correct
44	Runtime error	1 ms	600 KB	Execution killed with signal 6
45	Halted	0 ms	0 KB	-

Submission #1061830

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