답안 #984127

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
984127	2024-05-16T10:25:45 Z	CSQ31	고대 책들 (IOI17_books)	C++17	100 / 100	169 ms	52820 KB

books

#include "books.h"
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) (int)(a.size())
#define all(a) a.begin(),a.end()
typedef long long int ll;
typedef pair<int,int> pii;
const int MAXN = 1e6+1;
int mn[MAXN],mx[MAXN];
ll ans = 0;
int n = 0;
vector<int>p;
void extend(int &l,int &r){
	int l0 = min(mn[l],mn[r]);
	int r0 = max(mx[l],mx[r]);
	while(l0 < l || r < r0){
		while(l0 < l){
			l--;
			l0 = min(l0,mn[l]);
			r0 = max(r0,mx[l]);
		}
		while(r0 > r){
			r++;
			l0 = min(l0,mn[r]);
			r0 = max(r0,mx[r]);
		}
	}
}
void solve(int l,int r){
	extend(l,r);
	//cout<<l<<" "<<r<<'\n';
	int rcost = 0;
	int lcost = 0;

	int l0 = l,r0 = r;
	int L = l,R = r;
	r++;
	while(r < n){
		rcost += 2;
		extend(l,r);
		if(l < l0)break;
		r++;
	}
	L = l;
	R = r;
	l = l0,r = r0;

	l--;
	while(l >= 0){
		lcost+=2;
		extend(l,r);
		if(r > r0)break;
		l--;
	}
	L = min(L,l);
	R = max(R,r);
	//cout<<L<<" "<<R<<" "<<lcost<<" "<<rcost<<'\n';
	if(R == n){ //end of the line
	    ans += rcost;
		ans += lcost;
		return;
	}

	ans += min(lcost,rcost);
	solve(L,R);
}
ll minimum_walk(vector<int>P, int s) {
	p = P;
	n = sz(p);
	for(int i=0;i<n;i++)ans+=abs(i-p[i]);
	vector<bool>vis(n,0);
	for(int i=0;i<n;i++){
		if(vis[i])continue;
		int cur = i;
		mn[i] = mx[i] = i;
		vector<int>path;
		while(!vis[cur]){
			vis[cur] = 1;
			path.push_back(cur);
			cur = p[cur];
		}
		for(int x:path){
			mn[i] = min(mn[i],x);
			mx[i] = max(mx[i],x);
		}
		for(int x:path){
			mn[x] = mn[i];
			mx[x] = mx[i];
		}
	}
	// for(int i=0;i<n;i++)cout<<mn[i]<<" ";
	// cout<<'\n';
	// for(int i=0;i<n;i++)cout<<mx[i]<<" ";
	// cout<<'\n';
	solve(s,s);
	for(int i=0;i<s;i++){
		if(i==p[i])ans-=2;
		else break;
	}
	for(int i=n-1;i>s;i--){
		if(i==p[i])ans-=2;
		else break;
	}
	return ans;	
}

Subtask #1

12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2396 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	2396 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2392 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2396 KB	Output is correct

Subtask #2

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2396 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	2396 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2392 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2396 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2396 KB	Output is correct
23	Correct	1 ms	2396 KB	Output is correct
24	Correct	1 ms	2396 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2396 KB	Output is correct
27	Correct	1 ms	2392 KB	Output is correct
28	Correct	1 ms	2396 KB	Output is correct
29	Correct	1 ms	2392 KB	Output is correct

Subtask #3

28.0 / 28.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2396 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	2396 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2392 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2396 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2396 KB	Output is correct
23	Correct	1 ms	2396 KB	Output is correct
24	Correct	1 ms	2396 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2396 KB	Output is correct
27	Correct	1 ms	2392 KB	Output is correct
28	Correct	1 ms	2396 KB	Output is correct
29	Correct	1 ms	2392 KB	Output is correct
30	Correct	169 ms	30272 KB	Output is correct
31	Correct	116 ms	28676 KB	Output is correct
32	Correct	116 ms	26704 KB	Output is correct
33	Correct	107 ms	26596 KB	Output is correct
34	Correct	110 ms	26964 KB	Output is correct
35	Correct	106 ms	26704 KB	Output is correct
36	Correct	133 ms	26704 KB	Output is correct
37	Correct	92 ms	27112 KB	Output is correct
38	Correct	99 ms	26892 KB	Output is correct
39	Correct	86 ms	26704 KB	Output is correct
40	Correct	88 ms	27032 KB	Output is correct
41	Correct	105 ms	28208 KB	Output is correct
42	Correct	95 ms	27692 KB	Output is correct
43	Correct	101 ms	26780 KB	Output is correct

Subtask #4

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2396 KB	Output is correct
2	Correct	1 ms	2396 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	2396 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2396 KB	Output is correct
9	Correct	1 ms	2396 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2396 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct

Subtask #5

30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	2392 KB	Output is correct
2	Correct	1 ms	2396 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	2396 KB	Output is correct
5	Correct	1 ms	2396 KB	Output is correct
6	Correct	1 ms	2396 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	2392 KB	Output is correct
9	Correct	1 ms	2392 KB	Output is correct
10	Correct	1 ms	2396 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	1 ms	2396 KB	Output is correct
13	Correct	1 ms	2396 KB	Output is correct
14	Correct	1 ms	2396 KB	Output is correct
15	Correct	1 ms	2396 KB	Output is correct
16	Correct	1 ms	2396 KB	Output is correct
17	Correct	1 ms	2396 KB	Output is correct
18	Correct	1 ms	2396 KB	Output is correct
19	Correct	1 ms	2396 KB	Output is correct
20	Correct	1 ms	2396 KB	Output is correct
21	Correct	1 ms	2396 KB	Output is correct
22	Correct	1 ms	2396 KB	Output is correct
23	Correct	1 ms	2396 KB	Output is correct
24	Correct	1 ms	2396 KB	Output is correct
25	Correct	1 ms	2396 KB	Output is correct
26	Correct	1 ms	2396 KB	Output is correct
27	Correct	1 ms	2392 KB	Output is correct
28	Correct	1 ms	2396 KB	Output is correct
29	Correct	1 ms	2392 KB	Output is correct
30	Correct	169 ms	30272 KB	Output is correct
31	Correct	116 ms	28676 KB	Output is correct
32	Correct	116 ms	26704 KB	Output is correct
33	Correct	107 ms	26596 KB	Output is correct
34	Correct	110 ms	26964 KB	Output is correct
35	Correct	106 ms	26704 KB	Output is correct
36	Correct	133 ms	26704 KB	Output is correct
37	Correct	92 ms	27112 KB	Output is correct
38	Correct	99 ms	26892 KB	Output is correct
39	Correct	86 ms	26704 KB	Output is correct
40	Correct	88 ms	27032 KB	Output is correct
41	Correct	105 ms	28208 KB	Output is correct
42	Correct	95 ms	27692 KB	Output is correct
43	Correct	101 ms	26780 KB	Output is correct
44	Correct	1 ms	2396 KB	Output is correct
45	Correct	1 ms	2396 KB	Output is correct
46	Correct	1 ms	2396 KB	Output is correct
47	Correct	1 ms	2396 KB	Output is correct
48	Correct	1 ms	2396 KB	Output is correct
49	Correct	1 ms	2396 KB	Output is correct
50	Correct	1 ms	2396 KB	Output is correct
51	Correct	1 ms	2396 KB	Output is correct
52	Correct	1 ms	2396 KB	Output is correct
53	Correct	1 ms	2396 KB	Output is correct
54	Correct	1 ms	2396 KB	Output is correct
55	Correct	1 ms	2396 KB	Output is correct
56	Correct	1 ms	2396 KB	Output is correct
57	Correct	1 ms	2396 KB	Output is correct
58	Correct	1 ms	2396 KB	Output is correct
59	Correct	1 ms	2396 KB	Output is correct
60	Correct	1 ms	2396 KB	Output is correct
61	Correct	1 ms	2396 KB	Output is correct
62	Correct	1 ms	2396 KB	Output is correct
63	Correct	1 ms	2396 KB	Output is correct
64	Correct	103 ms	26712 KB	Output is correct
65	Correct	139 ms	26616 KB	Output is correct
66	Correct	91 ms	26868 KB	Output is correct
67	Correct	85 ms	26704 KB	Output is correct
68	Correct	10 ms	8540 KB	Output is correct
69	Correct	10 ms	8540 KB	Output is correct
70	Correct	10 ms	8384 KB	Output is correct
71	Correct	17 ms	8540 KB	Output is correct
72	Correct	17 ms	8536 KB	Output is correct
73	Correct	9 ms	8540 KB	Output is correct
74	Correct	103 ms	26612 KB	Output is correct
75	Correct	104 ms	26704 KB	Output is correct
76	Correct	104 ms	26872 KB	Output is correct
77	Correct	100 ms	26932 KB	Output is correct
78	Correct	109 ms	26616 KB	Output is correct
79	Correct	111 ms	26632 KB	Output is correct
80	Correct	104 ms	26652 KB	Output is correct
81	Correct	118 ms	52720 KB	Output is correct
82	Correct	141 ms	52820 KB	Output is correct
83	Correct	104 ms	29168 KB	Output is correct
84	Correct	103 ms	28408 KB	Output is correct
85	Correct	95 ms	27376 KB	Output is correct
86	Correct	92 ms	27008 KB	Output is correct
87	Correct	129 ms	38768 KB	Output is correct
88	Correct	150 ms	33780 KB	Output is correct
89	Correct	129 ms	29812 KB	Output is correct
90	Correct	87 ms	26876 KB	Output is correct
91	Correct	112 ms	26708 KB	Output is correct
92	Correct	89 ms	26960 KB	Output is correct