Submission #410975

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
410975	2021-05-24T02:38:26 Z	Kevin_Zhang_TW	Ancient Books (IOI17_books)	C++17	100 / 100	134 ms	14916 KB

books

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
void debug(auto l, auto r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
#include "books.h"

long long minimum_walk(std::vector<int> p, int s) {
	int n = p.size();
	ll res = 0;
	for (int i = 0;i < n;++i)
		res += abs(i - p[i]);

	if (res == 0) return 0;

	int L = 0, R = n-1;
	while (p[L] == L) ++L;
	while (p[R] == R) --R;

	chmax(R, s), chmin(L, s);

	auto expand = [&](int &l, int &r) {
		int nl = l, nr = r;
		auto upd = [&](int pos) {
			chmax(nr, p[pos]);
			chmin(nl, p[pos]);
		};
		upd(l), upd(r);

		while (nl < l || r < nr) {
			while (nl < l) {
				upd(--l);
			}
			while (r < nr) {
				upd(++r);
			}
		}

	};

	int l = s, r = s;
	expand(l, r);

	assert(l >= L && r <= R);

	while (L < l || r < R) {
		int costl = 0, costr = 0;
		int l_l = l, l_r = r;
		int r_l = l, r_r = r;

		bool nxt_l = false;
		{
			int &sl = l_l, &sr = l_r;
			while (sl > L && sr <= r) {
				expand(--sl, sr);
				costl += 2;
			}
			nxt_l = sr > r;
		}
		bool nxt_r = false;
		{
			int &sl = r_l, &sr = r_r;
			while (sl >= l && sr < R) {
				expand(sl, ++sr);
				costr += 2;
			}
			nxt_r = sl < l;
		}
		assert(nxt_r == nxt_l);
		if (nxt_r) {
			res += min(costl, costr);
			assert(l_l == r_l);
			assert(l_r == r_r);
		}
		else {
			res += costl + costr;
			assert(l_l == L && r_r == R);
		}
		l = min(l_l, r_l), r = max(l_r, r_r);
	}

	return res;
}

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	204 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	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	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	204 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	204 KB	Output is correct
30	Correct	117 ms	8040 KB	Output is correct
31	Correct	118 ms	8036 KB	Output is correct
32	Correct	115 ms	8048 KB	Output is correct
33	Correct	126 ms	8132 KB	Output is correct
34	Correct	120 ms	8032 KB	Output is correct
35	Correct	121 ms	8044 KB	Output is correct
36	Correct	122 ms	8032 KB	Output is correct
37	Correct	134 ms	8044 KB	Output is correct
38	Correct	116 ms	8112 KB	Output is correct
39	Correct	128 ms	8132 KB	Output is correct
40	Correct	115 ms	8004 KB	Output is correct
41	Correct	129 ms	8032 KB	Output is correct
42	Correct	123 ms	8048 KB	Output is correct
43	Correct	114 ms	8032 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	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

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	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	204 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	204 KB	Output is correct
30	Correct	117 ms	8040 KB	Output is correct
31	Correct	118 ms	8036 KB	Output is correct
32	Correct	115 ms	8048 KB	Output is correct
33	Correct	126 ms	8132 KB	Output is correct
34	Correct	120 ms	8032 KB	Output is correct
35	Correct	121 ms	8044 KB	Output is correct
36	Correct	122 ms	8032 KB	Output is correct
37	Correct	134 ms	8044 KB	Output is correct
38	Correct	116 ms	8112 KB	Output is correct
39	Correct	128 ms	8132 KB	Output is correct
40	Correct	115 ms	8004 KB	Output is correct
41	Correct	129 ms	8032 KB	Output is correct
42	Correct	123 ms	8048 KB	Output is correct
43	Correct	114 ms	8032 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	204 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	204 KB	Output is correct
55	Correct	1 ms	204 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	204 KB	Output is correct
62	Correct	1 ms	204 KB	Output is correct
63	Correct	1 ms	204 KB	Output is correct
64	Correct	123 ms	14800 KB	Output is correct
65	Correct	121 ms	14804 KB	Output is correct
66	Correct	122 ms	14812 KB	Output is correct
67	Correct	123 ms	14804 KB	Output is correct
68	Correct	12 ms	1632 KB	Output is correct
69	Correct	14 ms	1572 KB	Output is correct
70	Correct	12 ms	1568 KB	Output is correct
71	Correct	12 ms	1652 KB	Output is correct
72	Correct	12 ms	1576 KB	Output is correct
73	Correct	12 ms	1584 KB	Output is correct
74	Correct	125 ms	14788 KB	Output is correct
75	Correct	129 ms	14812 KB	Output is correct
76	Correct	119 ms	14812 KB	Output is correct
77	Correct	119 ms	14808 KB	Output is correct
78	Correct	119 ms	14800 KB	Output is correct
79	Correct	120 ms	14808 KB	Output is correct
80	Correct	119 ms	14816 KB	Output is correct
81	Correct	123 ms	14812 KB	Output is correct
82	Correct	132 ms	14788 KB	Output is correct
83	Correct	122 ms	14816 KB	Output is correct
84	Correct	123 ms	14812 KB	Output is correct
85	Correct	122 ms	14916 KB	Output is correct
86	Correct	119 ms	14808 KB	Output is correct
87	Correct	125 ms	14820 KB	Output is correct
88	Correct	131 ms	14788 KB	Output is correct
89	Correct	126 ms	14816 KB	Output is correct
90	Correct	120 ms	14788 KB	Output is correct
91	Correct	122 ms	14788 KB	Output is correct
92	Correct	120 ms	14816 KB	Output is correct

Submission #410975

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