Submission #337674

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
337674	2020-12-21T11:35:49 Z	pit4h	Ancient Books (IOI17_books)	C++14	50 / 100	164 ms	32236 KB

books

#include "books.h"
#include "bits/stdc++.h"
using namespace std;
using ll = long long;
ll solve(vector<int> p, int force) {
	int n = p.size(), s = 0, t = n-1;

	while(s+1<=force && p[s]==s) s++;
	while(t-1>=force && p[t]==t) t--;

	ll ans = 0;

	vector<int> cnt(n), L(n), R(n);
	for(int i=s; i<=t; ++i) {
		if(p[i] > i) cnt[i]++, cnt[p[i]]--;
	}
	int delta = 0;
	for(int i=s; i<=t; ++i) {
		delta += cnt[i];
		L[i] = delta;
	}

	cnt = vector<int>(n, 0);
	for(int i=s; i<=t; ++i) {
		if(p[i] < i) {
			cnt[i-1]++;
			if(p[i]-1>=0) cnt[p[i]-1]--;
		}
	}
	delta = 0;
	for(int i=t; i>=s; --i) {
		delta += cnt[i];
		R[i] = delta;
	}
	
	for(int i=s; i<t; ++i) {
		ans += max(2, max(L[i], R[i])*2);
	}
	return ans;
}
ll minimum_walk(vector<int> p, int s) {
	int n = p.size();
	vector<int> pref(n);
	pref[0] = p[0];
	for(int i=1; i<n; ++i) {
		pref[i] = max(pref[i-1], p[i]);
	}
	if(s==0 || p[s]!=s || pref[s-1]<s) {
		return solve(p, s);
	}
	ll ans = 1e18+1;
	vector<int> q = p;
	for(int i=0; i<n; ++i) {
		if(i==s) continue;
		q[i] = s;
		q[s] = p[i];
		ans = min(ans, solve(q, s));
		q[i] = p[i];
		q[s] = p[s];
	}
	return ans;
}

Subtask #1

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	492 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct

Subtask #2

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	492 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct

Subtask #3

28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	492 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	153 ms	32108 KB	Output is correct
31	Correct	150 ms	32236 KB	Output is correct
32	Correct	133 ms	32108 KB	Output is correct
33	Correct	142 ms	32236 KB	Output is correct
34	Correct	140 ms	32108 KB	Output is correct
35	Correct	141 ms	32108 KB	Output is correct
36	Correct	148 ms	32108 KB	Output is correct
37	Correct	164 ms	32108 KB	Output is correct
38	Correct	150 ms	32188 KB	Output is correct
39	Correct	152 ms	32236 KB	Output is correct
40	Correct	149 ms	32108 KB	Output is correct
41	Correct	155 ms	32108 KB	Output is correct
42	Correct	150 ms	32220 KB	Output is correct
43	Correct	149 ms	32108 KB	Output is correct

Subtask #4

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	364 KB	3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2	Halted	0 ms	0 KB	-

Subtask #5

0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	492 KB	Output is correct
7	Correct	1 ms	364 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	364 KB	Output is correct
30	Correct	153 ms	32108 KB	Output is correct
31	Correct	150 ms	32236 KB	Output is correct
32	Correct	133 ms	32108 KB	Output is correct
33	Correct	142 ms	32236 KB	Output is correct
34	Correct	140 ms	32108 KB	Output is correct
35	Correct	141 ms	32108 KB	Output is correct
36	Correct	148 ms	32108 KB	Output is correct
37	Correct	164 ms	32108 KB	Output is correct
38	Correct	150 ms	32188 KB	Output is correct
39	Correct	152 ms	32236 KB	Output is correct
40	Correct	149 ms	32108 KB	Output is correct
41	Correct	155 ms	32108 KB	Output is correct
42	Correct	150 ms	32220 KB	Output is correct
43	Correct	149 ms	32108 KB	Output is correct
44	Incorrect	1 ms	364 KB	3rd lines differ - on the 1st token, expected: '3304', found: '2744'
45	Halted	0 ms	0 KB	-