Submission #404124

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
404124	2021-05-13T19:59:59 Z	b00n0rp	Ancient Books (IOI17_books)	C++17	50 / 100	194 ms	19780 KB

books

#include<bits/stdc++.h>
#include "books.h"
using namespace std;

#define vi vector<int>
#define REP(i,n) for(int i = 0; i < n; i ++)
#define FOR(i,a,b) for(int i = a; i < b; i ++)

const int MX = 1000005;

int n,S;
int lft,rgt,cur = 0;
int C[MX],L[MX],R[MX];

int solve(int l,int r){
	int ll = L[C[l]];
	int rr = R[C[r]];
	while(ll < l or rr > r){
		if(ll < l){
			l--;
			ll = min(ll,L[C[l]]);
			rr = max(rr,R[C[l]]);
		}
		else{
			r++;
			rr = max(rr,R[C[r]]);
			ll = min(ll,L[C[r]]);
		}
	}
	int costleft = 0,costright = 0;
	int indleft = -1,indright = -1;
	int mn = l,mx = r;
	for(int i = l-1; i >= lft; i --){
		if(R[C[i]] > S){
			indleft = i;
			break;
		}
	}
	for(int i = r+1; i <= rgt; i ++){
		if(L[C[i]] < S){
			indright = i;
			break;
		}
	}
	if(indleft == -1){
		for(int i = l-1; i >= lft; i --){
			mn = min(mn,L[C[i]]);
			if(mn == i) costleft += 2;
		}
		for(int i = r+1; i <= rgt; i ++){
			mx = max(mx,R[C[i]]);
			if(mx == i) costright += 2;
		}
		return costleft+costright;
	}
	while(ll > indleft){
		costleft += 2;
		ll--;
		while(ll < l){
			l--;
			ll = min(ll,L[C[l]]);
		}
	}
	while(rr < indright){
		costright += 2;
		rr++;
		while(rr > r){
			r++;
			rr = max(rr,R[C[r]]);
		}
	}
	return min(costleft,costright)+solve(ll,rr);
}

long long minimum_walk(vi p, int s) {
	S = s;
	long long ans = 0;
	n = p.size();
	lft = s;
	rgt = s;
	REP(i,n) C[i] = -1;
	REP(i,n){
		ans += abs(p[i]-i);
		if(C[i] == -1){
			C[i] = cur;
			L[cur] = R[cur] = i;
			int j = i;
			while(true){
				j = p[j];
				C[j] = cur;
				R[cur] = max(R[cur],j);
				if(i == j) break;
			}
			cur++;
		}
		if(i != p[i]){
			lft = min(lft,i);
			rgt = max(rgt,i);
		}
	}
	return ans+solve(s,s);
}

Subtask #1

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct

Subtask #2

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	1 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	204 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	1 ms	204 KB	Output is correct
28	Correct	1 ms	204 KB	Output is correct
29	Correct	1 ms	332 KB	Output is correct

Subtask #3

28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	1 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	204 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	1 ms	204 KB	Output is correct
28	Correct	1 ms	204 KB	Output is correct
29	Correct	1 ms	332 KB	Output is correct
30	Correct	167 ms	12100 KB	Output is correct
31	Correct	194 ms	12044 KB	Output is correct
32	Correct	124 ms	19780 KB	Output is correct
33	Correct	136 ms	17388 KB	Output is correct
34	Correct	140 ms	17384 KB	Output is correct
35	Correct	133 ms	16248 KB	Output is correct
36	Correct	148 ms	13928 KB	Output is correct
37	Correct	129 ms	12264 KB	Output is correct
38	Correct	152 ms	12016 KB	Output is correct
39	Correct	156 ms	12008 KB	Output is correct
40	Correct	140 ms	12016 KB	Output is correct
41	Correct	167 ms	12016 KB	Output is correct
42	Correct	166 ms	12012 KB	Output is correct
43	Correct	149 ms	17784 KB	Output is correct

Subtask #4

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Incorrect	1 ms	332 KB	3rd lines differ - on the 1st token, expected: '9800', found: '9802'
3	Halted	0 ms	0 KB	-

Subtask #5

0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	1 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	204 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	1 ms	204 KB	Output is correct
28	Correct	1 ms	204 KB	Output is correct
29	Correct	1 ms	332 KB	Output is correct
30	Correct	167 ms	12100 KB	Output is correct
31	Correct	194 ms	12044 KB	Output is correct
32	Correct	124 ms	19780 KB	Output is correct
33	Correct	136 ms	17388 KB	Output is correct
34	Correct	140 ms	17384 KB	Output is correct
35	Correct	133 ms	16248 KB	Output is correct
36	Correct	148 ms	13928 KB	Output is correct
37	Correct	129 ms	12264 KB	Output is correct
38	Correct	152 ms	12016 KB	Output is correct
39	Correct	156 ms	12008 KB	Output is correct
40	Correct	140 ms	12016 KB	Output is correct
41	Correct	167 ms	12016 KB	Output is correct
42	Correct	166 ms	12012 KB	Output is correct
43	Correct	149 ms	17784 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Incorrect	1 ms	332 KB	3rd lines differ - on the 1st token, expected: '9800', found: '9802'
46	Halted	0 ms	0 KB	-