Submission #406889

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
406889	2021-05-18T07:16:41 Z	ja_kingy	Ancient Books (IOI17_books)	C++14	100 / 100	221 ms	34952 KB

books

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

typedef pair<int,int> pii;

long long minimum_walk(vector<int> p, int s) {
	long long ans = 0;
	int n = p.size(), ccnt = 0;
	vector<int> mn(n), mx(n), cyc(n);
	vector<pii> evs;
	for (int i = 0; i < n; ++i) {
		ans += abs(i-p[i]);
		if (!cyc[i]) {
			ccnt++;
			cyc[i] = ccnt;
			mn[ccnt] = mx[ccnt] = i;
			for (int x = p[i]; x != i; x = p[x]) {
				cyc[x] = ccnt;
				mn[ccnt] = min(mn[ccnt], x);
				mx[ccnt] = max(mx[ccnt], x);
			}
			if (mn[ccnt] != mx[ccnt] || i == s) {
				evs.push_back({mn[ccnt], -1});
				evs.push_back({mx[ccnt], 1});
			}
		}
	}
	sort(evs.begin(), evs.end());
	int rcnt = 0, pv = -1, fst;
	for (pii ev: evs) {
		if (rcnt == 0 && ~pv) {
			fst = ev.first;
			ans += (ev.first - pv) * 2;
		}
		rcnt -= ev.second;
		pv = ev.first;
		if (rcnt == 0 && fst <= s && s <= pv) {
			//cerr << rcnt << ' ' << fst << ' ' << pv << endl;
			int cl = s, cr = s, l = mn[cyc[s]], r = mx[cyc[s]];
			for (;;) {
				// cerr << l << ' ' << r << endl;
				while (cl != l || cr != r) {
					if (cl != l) {
						cl--;
						l = min(l, mn[cyc[cl]]);
						r = max(r, mx[cyc[cl]]);
					} else {
						cr++;
						l = min(l, mn[cyc[cr]]);
						r = max(r, mx[cyc[cr]]);
					}
				}
				if (l == fst || r == pv) break;
				ans+=2;
				l--;
				r++;
			}
		}
	}
	return ans;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:54:5: warning: 'fst' may be used uninitialized in this function [-Wmaybe-uninitialized]
   54 |     if (l == fst || r == pv) break;
      |     ^~

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	292 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	288 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	292 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	288 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	292 KB	Output is correct
20	Correct	1 ms	328 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	1 ms	288 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	292 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	204 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	292 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	288 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	292 KB	Output is correct
20	Correct	1 ms	328 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	1 ms	288 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	292 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	204 KB	Output is correct
30	Correct	205 ms	26536 KB	Output is correct
31	Correct	221 ms	26480 KB	Output is correct
32	Correct	131 ms	26696 KB	Output is correct
33	Correct	172 ms	30828 KB	Output is correct
34	Correct	145 ms	30808 KB	Output is correct
35	Correct	148 ms	30804 KB	Output is correct
36	Correct	152 ms	30796 KB	Output is correct
37	Correct	162 ms	27224 KB	Output is correct
38	Correct	136 ms	26708 KB	Output is correct
39	Correct	133 ms	26812 KB	Output is correct
40	Correct	137 ms	26592 KB	Output is correct
41	Correct	147 ms	26592 KB	Output is correct
42	Correct	144 ms	26584 KB	Output is correct
43	Correct	161 ms	30940 KB	Output is correct

Subtask #4
20.0 / 20.0

#	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	332 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	292 KB	Output is correct
12	Correct	1 ms	300 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	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct

Subtask #5
30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	292 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	288 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	292 KB	Output is correct
20	Correct	1 ms	328 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	1 ms	288 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	292 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	204 KB	Output is correct
30	Correct	205 ms	26536 KB	Output is correct
31	Correct	221 ms	26480 KB	Output is correct
32	Correct	131 ms	26696 KB	Output is correct
33	Correct	172 ms	30828 KB	Output is correct
34	Correct	145 ms	30808 KB	Output is correct
35	Correct	148 ms	30804 KB	Output is correct
36	Correct	152 ms	30796 KB	Output is correct
37	Correct	162 ms	27224 KB	Output is correct
38	Correct	136 ms	26708 KB	Output is correct
39	Correct	133 ms	26812 KB	Output is correct
40	Correct	137 ms	26592 KB	Output is correct
41	Correct	147 ms	26592 KB	Output is correct
42	Correct	144 ms	26584 KB	Output is correct
43	Correct	161 ms	30940 KB	Output is correct
44	Correct	1 ms	204 KB	Output is correct
45	Correct	1 ms	204 KB	Output is correct
46	Correct	1 ms	204 KB	Output is correct
47	Correct	1 ms	204 KB	Output is correct
48	Correct	1 ms	204 KB	Output is correct
49	Correct	1 ms	204 KB	Output is correct
50	Correct	1 ms	204 KB	Output is correct
51	Correct	1 ms	332 KB	Output is correct
52	Correct	1 ms	204 KB	Output is correct
53	Correct	1 ms	204 KB	Output is correct
54	Correct	1 ms	292 KB	Output is correct
55	Correct	1 ms	300 KB	Output is correct
56	Correct	1 ms	204 KB	Output is correct
57	Correct	1 ms	204 KB	Output is correct
58	Correct	1 ms	204 KB	Output is correct
59	Correct	1 ms	204 KB	Output is correct
60	Correct	1 ms	204 KB	Output is correct
61	Correct	1 ms	332 KB	Output is correct
62	Correct	1 ms	332 KB	Output is correct
63	Correct	1 ms	204 KB	Output is correct
64	Correct	165 ms	28764 KB	Output is correct
65	Correct	157 ms	28752 KB	Output is correct
66	Correct	140 ms	27328 KB	Output is correct
67	Correct	147 ms	26980 KB	Output is correct
68	Correct	20 ms	3108 KB	Output is correct
69	Correct	14 ms	3020 KB	Output is correct
70	Correct	14 ms	3116 KB	Output is correct
71	Correct	15 ms	3192 KB	Output is correct
72	Correct	14 ms	3108 KB	Output is correct
73	Correct	14 ms	2800 KB	Output is correct
74	Correct	143 ms	30792 KB	Output is correct
75	Correct	147 ms	30732 KB	Output is correct
76	Correct	189 ms	30792 KB	Output is correct
77	Correct	162 ms	30772 KB	Output is correct
78	Correct	178 ms	34896 KB	Output is correct
79	Correct	211 ms	34892 KB	Output is correct
80	Correct	145 ms	26596 KB	Output is correct
81	Correct	179 ms	34856 KB	Output is correct
82	Correct	187 ms	34952 KB	Output is correct
83	Correct	218 ms	30796 KB	Output is correct
84	Correct	167 ms	30800 KB	Output is correct
85	Correct	147 ms	28756 KB	Output is correct
86	Correct	182 ms	27736 KB	Output is correct
87	Correct	153 ms	30804 KB	Output is correct
88	Correct	187 ms	34884 KB	Output is correct
89	Correct	186 ms	34864 KB	Output is correct
90	Correct	156 ms	27328 KB	Output is correct
91	Correct	134 ms	26820 KB	Output is correct
92	Correct	145 ms	26592 KB	Output is correct

Submission #406889

Compilation message

Subtask #1 12.0 / 12.0

Subtask #2 10.0 / 10.0

Subtask #3 28.0 / 28.0

Subtask #4 20.0 / 20.0

Subtask #5 30.0 / 30.0

Subtask #1
12.0 / 12.0

Subtask #2
10.0 / 10.0

Subtask #3
28.0 / 28.0

Subtask #4
20.0 / 20.0

Subtask #5
30.0 / 30.0