답안 #286905

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
286905	2020-08-31T06:57:14 Z	tmwilliamlin168	고대 책들 (IOI17_books)	C++14	100 / 100	1147 ms	209380 KB

books

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

#define ll long long
#define ar array

const int mxN=1e6;
int n, a, b, who[mxN];
vector<int> adj[mxN], adj2[mxN], st, adj3[mxN], c;
bool vis[mxN];
ar<int, 3> dp[mxN];

void dfs1(int u) {
	vis[u]=1;
	for(int v : adj[u])
		if(!vis[v])
			dfs1(v);
	st.push_back(u);
}

void dfs2(int u, int r) {
	vis[u]=0;
	c.push_back(u);
	who[u]=r;
	for(int v : adj2[u])
		if(vis[v])
			dfs2(v, r);
}

ll minimum_walk(vector<int> p, int s) {
	n=p.size();
	ll ans=0;
	for(; a<s&&p[a]==a; ++a);
	for(b=n-1; b>s&&p[b]==b; --b);
	for(int i=a; i<s; ++i)
		adj[i].push_back(i+1);
	for(int i=b; i>s; --i)
		adj[i].push_back(i-1);
	for(int i=a; i<=b; ++i) {
		ans+=abs(i-p[i]);
		adj[i].push_back(p[i]);
	}
	for(int i=a; i<=b; ++i)
		if(!vis[i])
			dfs1(i);
	for(int i=a; i<=b; ++i)
		for(int j : adj[i])
			adj2[j].push_back(i);
	for(int i=b-a; ~i; --i) {
		if(!vis[st[i]])
			continue;
		dfs2(st[i], st[i]);
		dp[st[i]]={n, n, n};
		if(!vis[a]&&st[i]==who[a])
			dp[st[i]][0]=0;
		if(!vis[b]&&st[i]==who[b])
			dp[st[i]][1]=0;
		for(int u : c)
			for(int v : adj2[u])
				for(int k : {0, 1, 2})
					dp[st[i]][k]=min(dp[who[v]][k]+1, dp[st[i]][k]);
		dp[st[i]][2]=min(dp[st[i]][0]+dp[st[i]][1], dp[st[i]][2]);
		c.clear();
	}
	return ans+2*dp[who[s]][2];
}

Subtask #1

12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	70784 KB	Output is correct
2	Correct	44 ms	70776 KB	Output is correct
3	Correct	43 ms	70776 KB	Output is correct
4	Correct	44 ms	70776 KB	Output is correct
5	Correct	44 ms	70824 KB	Output is correct
6	Correct	43 ms	70780 KB	Output is correct
7	Correct	43 ms	70780 KB	Output is correct
8	Correct	44 ms	70776 KB	Output is correct
9	Correct	44 ms	70784 KB	Output is correct
10	Correct	44 ms	70780 KB	Output is correct
11	Correct	44 ms	70784 KB	Output is correct
12	Correct	45 ms	70776 KB	Output is correct
13	Correct	43 ms	70784 KB	Output is correct
14	Correct	44 ms	70904 KB	Output is correct
15	Correct	45 ms	70776 KB	Output is correct
16	Correct	43 ms	70784 KB	Output is correct
17	Correct	44 ms	70776 KB	Output is correct
18	Correct	43 ms	70784 KB	Output is correct

Subtask #2

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	70784 KB	Output is correct
2	Correct	44 ms	70776 KB	Output is correct
3	Correct	43 ms	70776 KB	Output is correct
4	Correct	44 ms	70776 KB	Output is correct
5	Correct	44 ms	70824 KB	Output is correct
6	Correct	43 ms	70780 KB	Output is correct
7	Correct	43 ms	70780 KB	Output is correct
8	Correct	44 ms	70776 KB	Output is correct
9	Correct	44 ms	70784 KB	Output is correct
10	Correct	44 ms	70780 KB	Output is correct
11	Correct	44 ms	70784 KB	Output is correct
12	Correct	45 ms	70776 KB	Output is correct
13	Correct	43 ms	70784 KB	Output is correct
14	Correct	44 ms	70904 KB	Output is correct
15	Correct	45 ms	70776 KB	Output is correct
16	Correct	43 ms	70784 KB	Output is correct
17	Correct	44 ms	70776 KB	Output is correct
18	Correct	43 ms	70784 KB	Output is correct
19	Correct	43 ms	70912 KB	Output is correct
20	Correct	44 ms	70904 KB	Output is correct
21	Correct	44 ms	70808 KB	Output is correct
22	Correct	47 ms	71032 KB	Output is correct
23	Correct	44 ms	70904 KB	Output is correct
24	Correct	45 ms	70904 KB	Output is correct
25	Correct	44 ms	70904 KB	Output is correct
26	Correct	45 ms	70908 KB	Output is correct
27	Correct	44 ms	70912 KB	Output is correct
28	Correct	45 ms	70904 KB	Output is correct
29	Correct	44 ms	70904 KB	Output is correct

Subtask #3

28.0 / 28.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	70784 KB	Output is correct
2	Correct	44 ms	70776 KB	Output is correct
3	Correct	43 ms	70776 KB	Output is correct
4	Correct	44 ms	70776 KB	Output is correct
5	Correct	44 ms	70824 KB	Output is correct
6	Correct	43 ms	70780 KB	Output is correct
7	Correct	43 ms	70780 KB	Output is correct
8	Correct	44 ms	70776 KB	Output is correct
9	Correct	44 ms	70784 KB	Output is correct
10	Correct	44 ms	70780 KB	Output is correct
11	Correct	44 ms	70784 KB	Output is correct
12	Correct	45 ms	70776 KB	Output is correct
13	Correct	43 ms	70784 KB	Output is correct
14	Correct	44 ms	70904 KB	Output is correct
15	Correct	45 ms	70776 KB	Output is correct
16	Correct	43 ms	70784 KB	Output is correct
17	Correct	44 ms	70776 KB	Output is correct
18	Correct	43 ms	70784 KB	Output is correct
19	Correct	43 ms	70912 KB	Output is correct
20	Correct	44 ms	70904 KB	Output is correct
21	Correct	44 ms	70808 KB	Output is correct
22	Correct	47 ms	71032 KB	Output is correct
23	Correct	44 ms	70904 KB	Output is correct
24	Correct	45 ms	70904 KB	Output is correct
25	Correct	44 ms	70904 KB	Output is correct
26	Correct	45 ms	70908 KB	Output is correct
27	Correct	44 ms	70912 KB	Output is correct
28	Correct	45 ms	70904 KB	Output is correct
29	Correct	44 ms	70904 KB	Output is correct
30	Correct	1147 ms	203108 KB	Output is correct
31	Correct	1118 ms	203236 KB	Output is correct
32	Correct	198 ms	80376 KB	Output is correct
33	Correct	500 ms	163552 KB	Output is correct
34	Correct	488 ms	163568 KB	Output is correct
35	Correct	499 ms	163560 KB	Output is correct
36	Correct	506 ms	163560 KB	Output is correct
37	Correct	534 ms	162532 KB	Output is correct
38	Correct	549 ms	155496 KB	Output is correct
39	Correct	550 ms	155364 KB	Output is correct
40	Correct	610 ms	155112 KB	Output is correct
41	Correct	911 ms	179820 KB	Output is correct
42	Correct	862 ms	173928 KB	Output is correct
43	Correct	544 ms	202852 KB	Output is correct

Subtask #4

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	71032 KB	Output is correct
2	Correct	46 ms	70904 KB	Output is correct
3	Correct	46 ms	70912 KB	Output is correct
4	Correct	46 ms	70912 KB	Output is correct
5	Correct	46 ms	70912 KB	Output is correct
6	Correct	45 ms	70904 KB	Output is correct
7	Correct	46 ms	70904 KB	Output is correct
8	Correct	46 ms	70904 KB	Output is correct
9	Correct	47 ms	70904 KB	Output is correct
10	Correct	45 ms	70776 KB	Output is correct
11	Correct	46 ms	70912 KB	Output is correct
12	Correct	47 ms	70904 KB	Output is correct
13	Correct	46 ms	70904 KB	Output is correct
14	Correct	47 ms	70904 KB	Output is correct
15	Correct	46 ms	70904 KB	Output is correct
16	Correct	47 ms	70904 KB	Output is correct
17	Correct	48 ms	71032 KB	Output is correct
18	Correct	46 ms	70904 KB	Output is correct
19	Correct	46 ms	70904 KB	Output is correct
20	Correct	46 ms	70904 KB	Output is correct

Subtask #5

30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	70784 KB	Output is correct
2	Correct	44 ms	70776 KB	Output is correct
3	Correct	43 ms	70776 KB	Output is correct
4	Correct	44 ms	70776 KB	Output is correct
5	Correct	44 ms	70824 KB	Output is correct
6	Correct	43 ms	70780 KB	Output is correct
7	Correct	43 ms	70780 KB	Output is correct
8	Correct	44 ms	70776 KB	Output is correct
9	Correct	44 ms	70784 KB	Output is correct
10	Correct	44 ms	70780 KB	Output is correct
11	Correct	44 ms	70784 KB	Output is correct
12	Correct	45 ms	70776 KB	Output is correct
13	Correct	43 ms	70784 KB	Output is correct
14	Correct	44 ms	70904 KB	Output is correct
15	Correct	45 ms	70776 KB	Output is correct
16	Correct	43 ms	70784 KB	Output is correct
17	Correct	44 ms	70776 KB	Output is correct
18	Correct	43 ms	70784 KB	Output is correct
19	Correct	43 ms	70912 KB	Output is correct
20	Correct	44 ms	70904 KB	Output is correct
21	Correct	44 ms	70808 KB	Output is correct
22	Correct	47 ms	71032 KB	Output is correct
23	Correct	44 ms	70904 KB	Output is correct
24	Correct	45 ms	70904 KB	Output is correct
25	Correct	44 ms	70904 KB	Output is correct
26	Correct	45 ms	70908 KB	Output is correct
27	Correct	44 ms	70912 KB	Output is correct
28	Correct	45 ms	70904 KB	Output is correct
29	Correct	44 ms	70904 KB	Output is correct
30	Correct	1147 ms	203108 KB	Output is correct
31	Correct	1118 ms	203236 KB	Output is correct
32	Correct	198 ms	80376 KB	Output is correct
33	Correct	500 ms	163552 KB	Output is correct
34	Correct	488 ms	163568 KB	Output is correct
35	Correct	499 ms	163560 KB	Output is correct
36	Correct	506 ms	163560 KB	Output is correct
37	Correct	534 ms	162532 KB	Output is correct
38	Correct	549 ms	155496 KB	Output is correct
39	Correct	550 ms	155364 KB	Output is correct
40	Correct	610 ms	155112 KB	Output is correct
41	Correct	911 ms	179820 KB	Output is correct
42	Correct	862 ms	173928 KB	Output is correct
43	Correct	544 ms	202852 KB	Output is correct
44	Correct	46 ms	71032 KB	Output is correct
45	Correct	46 ms	70904 KB	Output is correct
46	Correct	46 ms	70912 KB	Output is correct
47	Correct	46 ms	70912 KB	Output is correct
48	Correct	46 ms	70912 KB	Output is correct
49	Correct	45 ms	70904 KB	Output is correct
50	Correct	46 ms	70904 KB	Output is correct
51	Correct	46 ms	70904 KB	Output is correct
52	Correct	47 ms	70904 KB	Output is correct
53	Correct	45 ms	70776 KB	Output is correct
54	Correct	46 ms	70912 KB	Output is correct
55	Correct	47 ms	70904 KB	Output is correct
56	Correct	46 ms	70904 KB	Output is correct
57	Correct	47 ms	70904 KB	Output is correct
58	Correct	46 ms	70904 KB	Output is correct
59	Correct	47 ms	70904 KB	Output is correct
60	Correct	48 ms	71032 KB	Output is correct
61	Correct	46 ms	70904 KB	Output is correct
62	Correct	46 ms	70904 KB	Output is correct
63	Correct	46 ms	70904 KB	Output is correct
64	Correct	523 ms	201176 KB	Output is correct
65	Correct	527 ms	201868 KB	Output is correct
66	Correct	579 ms	184220 KB	Output is correct
67	Correct	612 ms	182244 KB	Output is correct
68	Correct	94 ms	84212 KB	Output is correct
69	Correct	97 ms	82420 KB	Output is correct
70	Correct	96 ms	84084 KB	Output is correct
71	Correct	93 ms	83700 KB	Output is correct
72	Correct	91 ms	83572 KB	Output is correct
73	Correct	101 ms	82288 KB	Output is correct
74	Correct	506 ms	196708 KB	Output is correct
75	Correct	514 ms	191972 KB	Output is correct
76	Correct	575 ms	209380 KB	Output is correct
77	Correct	552 ms	208360 KB	Output is correct
78	Correct	541 ms	182884 KB	Output is correct
79	Correct	547 ms	191972 KB	Output is correct
80	Correct	201 ms	85368 KB	Output is correct
81	Correct	491 ms	189924 KB	Output is correct
82	Correct	489 ms	189412 KB	Output is correct
83	Correct	543 ms	192104 KB	Output is correct
84	Correct	525 ms	191972 KB	Output is correct
85	Correct	537 ms	192100 KB	Output is correct
86	Correct	562 ms	191848 KB	Output is correct
87	Correct	521 ms	191972 KB	Output is correct
88	Correct	514 ms	192116 KB	Output is correct
89	Correct	538 ms	191972 KB	Output is correct
90	Correct	556 ms	191716 KB	Output is correct
91	Correct	590 ms	185700 KB	Output is correct
92	Correct	613 ms	181856 KB	Output is correct