Submission #338227

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
338227	2020-12-22T18:53:36 Z	pit4h	Ancient Books (IOI17_books)	C++14	100 / 100	295 ms	34780 KB

books

#include "books.h"
#include "bits/stdc++.h"
#define st first
#define nd second
#define mp make_pair
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int N = 1e6+1;
struct DSU {
	int f[N], cnt[N], l[N], r[N];
	DSU() {
		for(int i=0; i<N; ++i) {
			f[i] = l[i] = r[i] = i;
			cnt[i] = 1;
		}
	}
	int Find(int x) {
		if(f[x]==x) return x;
		f[x] = Find(f[x]);
		return f[x];
	}
	void Union(int x, int y) {
		x = Find(x), y = Find(y);
		if(x==y) return;
		if(cnt[x] < cnt[y]) swap(x, y);
		cnt[x] += cnt[y];
		l[x] = min(l[x], l[y]);
		r[x] = max(r[x], r[y]);
		f[y] = x;
	}
	int getl(int x) { return l[Find(x)]; }
	int getr(int x) { return r[Find(x)]; }
};
DSU dsu;

ll minimum_walk(vector<int> p, int s) {
	int n = p.size();
	ll ans = 0;
	for(int i=0; i<n; ++i) {
		ans += abs(p[i] - i);
		dsu.Union(i, p[i]);
	}
	//cerr<<ans<<'\n';

	vector<int> vec;
	for(int i=n-1; i>=0; --i) {
		while(vec.size() && dsu.getr(i) >= vec.back()) {
			if(dsu.getl(vec.back()) < i) {
				dsu.Union(i, vec.back());
			}
			vec.pop_back();
		}
		vec.push_back(i);
	}
	
	int le=0, ri=n-1;
	while(le<s && dsu.getl(le)==dsu.getr(le)) {
		le++;
	}
	while(ri>s && dsu.getl(ri)==dsu.getr(ri)) {
		ri--;
	}
	
	while(true) {
		int l=le, r=ri, cur=-1;
		int cost1=0, cost2=0;
		for(int i=dsu.getl(s)-1; i>=le; --i) {
			if(dsu.getr(i) > s) {
				l = i;	
				cur = dsu.Find(i);
				break;
			}
		}
		for(int i=dsu.getr(s)+1; i<=ri; ++i) {
			if(dsu.getl(i) < s) {
				r = i;
				break;
			}
		}
		if(cur!=-1) l++, cost1++;
		for(int i=l; i<dsu.getl(s); ++i) {
			cost1++;
			i = dsu.getr(i);
		}
		if(cur!=-1) r--, cost2++;
		for(int i=r; i>dsu.getr(s); --i) {
			cost2++;
			i = dsu.getl(i);
		}
		if(cur==-1) {
			ans += (cost1+cost2)*2;	
			break;
		}
		ans += min(cost1, cost2)*2;
		dsu.Union(cur, s);
	}
	return ans;
}

Subtask #1
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	11 ms	15980 KB	Output is correct
2	Correct	10 ms	15980 KB	Output is correct
3	Correct	10 ms	15980 KB	Output is correct
4	Correct	11 ms	16000 KB	Output is correct
5	Correct	10 ms	15980 KB	Output is correct
6	Correct	11 ms	16128 KB	Output is correct
7	Correct	10 ms	15980 KB	Output is correct
8	Correct	10 ms	15980 KB	Output is correct
9	Correct	10 ms	15980 KB	Output is correct
10	Correct	10 ms	15980 KB	Output is correct
11	Correct	11 ms	15980 KB	Output is correct
12	Correct	10 ms	15980 KB	Output is correct
13	Correct	10 ms	15980 KB	Output is correct
14	Correct	10 ms	15980 KB	Output is correct
15	Correct	10 ms	15980 KB	Output is correct
16	Correct	12 ms	15980 KB	Output is correct
17	Correct	10 ms	15980 KB	Output is correct
18	Correct	10 ms	15980 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	11 ms	15980 KB	Output is correct
2	Correct	10 ms	15980 KB	Output is correct
3	Correct	10 ms	15980 KB	Output is correct
4	Correct	11 ms	16000 KB	Output is correct
5	Correct	10 ms	15980 KB	Output is correct
6	Correct	11 ms	16128 KB	Output is correct
7	Correct	10 ms	15980 KB	Output is correct
8	Correct	10 ms	15980 KB	Output is correct
9	Correct	10 ms	15980 KB	Output is correct
10	Correct	10 ms	15980 KB	Output is correct
11	Correct	11 ms	15980 KB	Output is correct
12	Correct	10 ms	15980 KB	Output is correct
13	Correct	10 ms	15980 KB	Output is correct
14	Correct	10 ms	15980 KB	Output is correct
15	Correct	10 ms	15980 KB	Output is correct
16	Correct	12 ms	15980 KB	Output is correct
17	Correct	10 ms	15980 KB	Output is correct
18	Correct	10 ms	15980 KB	Output is correct
19	Correct	11 ms	15980 KB	Output is correct
20	Correct	11 ms	15980 KB	Output is correct
21	Correct	11 ms	15980 KB	Output is correct
22	Correct	10 ms	15980 KB	Output is correct
23	Correct	10 ms	15980 KB	Output is correct
24	Correct	10 ms	15980 KB	Output is correct
25	Correct	11 ms	16108 KB	Output is correct
26	Correct	11 ms	15980 KB	Output is correct
27	Correct	11 ms	16000 KB	Output is correct
28	Correct	10 ms	15980 KB	Output is correct
29	Correct	10 ms	15980 KB	Output is correct

Subtask #3
28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	11 ms	15980 KB	Output is correct
2	Correct	10 ms	15980 KB	Output is correct
3	Correct	10 ms	15980 KB	Output is correct
4	Correct	11 ms	16000 KB	Output is correct
5	Correct	10 ms	15980 KB	Output is correct
6	Correct	11 ms	16128 KB	Output is correct
7	Correct	10 ms	15980 KB	Output is correct
8	Correct	10 ms	15980 KB	Output is correct
9	Correct	10 ms	15980 KB	Output is correct
10	Correct	10 ms	15980 KB	Output is correct
11	Correct	11 ms	15980 KB	Output is correct
12	Correct	10 ms	15980 KB	Output is correct
13	Correct	10 ms	15980 KB	Output is correct
14	Correct	10 ms	15980 KB	Output is correct
15	Correct	10 ms	15980 KB	Output is correct
16	Correct	12 ms	15980 KB	Output is correct
17	Correct	10 ms	15980 KB	Output is correct
18	Correct	10 ms	15980 KB	Output is correct
19	Correct	11 ms	15980 KB	Output is correct
20	Correct	11 ms	15980 KB	Output is correct
21	Correct	11 ms	15980 KB	Output is correct
22	Correct	10 ms	15980 KB	Output is correct
23	Correct	10 ms	15980 KB	Output is correct
24	Correct	10 ms	15980 KB	Output is correct
25	Correct	11 ms	16108 KB	Output is correct
26	Correct	11 ms	15980 KB	Output is correct
27	Correct	11 ms	16000 KB	Output is correct
28	Correct	10 ms	15980 KB	Output is correct
29	Correct	10 ms	15980 KB	Output is correct
30	Correct	291 ms	23796 KB	Output is correct
31	Correct	295 ms	23832 KB	Output is correct
32	Correct	145 ms	27996 KB	Output is correct
33	Correct	159 ms	27996 KB	Output is correct
34	Correct	166 ms	27996 KB	Output is correct
35	Correct	167 ms	25952 KB	Output is correct
36	Correct	170 ms	24932 KB	Output is correct
37	Correct	173 ms	23936 KB	Output is correct
38	Correct	180 ms	23788 KB	Output is correct
39	Correct	175 ms	23788 KB	Output is correct
40	Correct	184 ms	23916 KB	Output is correct
41	Correct	226 ms	23784 KB	Output is correct
42	Correct	233 ms	23916 KB	Output is correct
43	Correct	182 ms	23912 KB	Output is correct

Subtask #4
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	11 ms	15980 KB	Output is correct
2	Correct	11 ms	15980 KB	Output is correct
3	Correct	11 ms	15980 KB	Output is correct
4	Correct	11 ms	15980 KB	Output is correct
5	Correct	11 ms	15980 KB	Output is correct
6	Correct	11 ms	15980 KB	Output is correct
7	Correct	11 ms	15980 KB	Output is correct
8	Correct	11 ms	15980 KB	Output is correct
9	Correct	11 ms	15980 KB	Output is correct
10	Correct	11 ms	15980 KB	Output is correct
11	Correct	11 ms	15980 KB	Output is correct
12	Correct	11 ms	15980 KB	Output is correct
13	Correct	11 ms	15980 KB	Output is correct
14	Correct	12 ms	15980 KB	Output is correct
15	Correct	11 ms	15980 KB	Output is correct
16	Correct	11 ms	15980 KB	Output is correct
17	Correct	11 ms	15980 KB	Output is correct
18	Correct	11 ms	15980 KB	Output is correct
19	Correct	11 ms	15980 KB	Output is correct
20	Correct	11 ms	15980 KB	Output is correct

Subtask #5
30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	11 ms	15980 KB	Output is correct
2	Correct	10 ms	15980 KB	Output is correct
3	Correct	10 ms	15980 KB	Output is correct
4	Correct	11 ms	16000 KB	Output is correct
5	Correct	10 ms	15980 KB	Output is correct
6	Correct	11 ms	16128 KB	Output is correct
7	Correct	10 ms	15980 KB	Output is correct
8	Correct	10 ms	15980 KB	Output is correct
9	Correct	10 ms	15980 KB	Output is correct
10	Correct	10 ms	15980 KB	Output is correct
11	Correct	11 ms	15980 KB	Output is correct
12	Correct	10 ms	15980 KB	Output is correct
13	Correct	10 ms	15980 KB	Output is correct
14	Correct	10 ms	15980 KB	Output is correct
15	Correct	10 ms	15980 KB	Output is correct
16	Correct	12 ms	15980 KB	Output is correct
17	Correct	10 ms	15980 KB	Output is correct
18	Correct	10 ms	15980 KB	Output is correct
19	Correct	11 ms	15980 KB	Output is correct
20	Correct	11 ms	15980 KB	Output is correct
21	Correct	11 ms	15980 KB	Output is correct
22	Correct	10 ms	15980 KB	Output is correct
23	Correct	10 ms	15980 KB	Output is correct
24	Correct	10 ms	15980 KB	Output is correct
25	Correct	11 ms	16108 KB	Output is correct
26	Correct	11 ms	15980 KB	Output is correct
27	Correct	11 ms	16000 KB	Output is correct
28	Correct	10 ms	15980 KB	Output is correct
29	Correct	10 ms	15980 KB	Output is correct
30	Correct	291 ms	23796 KB	Output is correct
31	Correct	295 ms	23832 KB	Output is correct
32	Correct	145 ms	27996 KB	Output is correct
33	Correct	159 ms	27996 KB	Output is correct
34	Correct	166 ms	27996 KB	Output is correct
35	Correct	167 ms	25952 KB	Output is correct
36	Correct	170 ms	24932 KB	Output is correct
37	Correct	173 ms	23936 KB	Output is correct
38	Correct	180 ms	23788 KB	Output is correct
39	Correct	175 ms	23788 KB	Output is correct
40	Correct	184 ms	23916 KB	Output is correct
41	Correct	226 ms	23784 KB	Output is correct
42	Correct	233 ms	23916 KB	Output is correct
43	Correct	182 ms	23912 KB	Output is correct
44	Correct	11 ms	15980 KB	Output is correct
45	Correct	11 ms	15980 KB	Output is correct
46	Correct	11 ms	15980 KB	Output is correct
47	Correct	11 ms	15980 KB	Output is correct
48	Correct	11 ms	15980 KB	Output is correct
49	Correct	11 ms	15980 KB	Output is correct
50	Correct	11 ms	15980 KB	Output is correct
51	Correct	11 ms	15980 KB	Output is correct
52	Correct	11 ms	15980 KB	Output is correct
53	Correct	11 ms	15980 KB	Output is correct
54	Correct	11 ms	15980 KB	Output is correct
55	Correct	11 ms	15980 KB	Output is correct
56	Correct	11 ms	15980 KB	Output is correct
57	Correct	12 ms	15980 KB	Output is correct
58	Correct	11 ms	15980 KB	Output is correct
59	Correct	11 ms	15980 KB	Output is correct
60	Correct	11 ms	15980 KB	Output is correct
61	Correct	11 ms	15980 KB	Output is correct
62	Correct	11 ms	15980 KB	Output is correct
63	Correct	11 ms	15980 KB	Output is correct
64	Correct	155 ms	30700 KB	Output is correct
65	Correct	163 ms	30824 KB	Output is correct
66	Correct	185 ms	30572 KB	Output is correct
67	Correct	186 ms	30572 KB	Output is correct
68	Correct	26 ms	17388 KB	Output is correct
69	Correct	29 ms	17388 KB	Output is correct
70	Correct	26 ms	17388 KB	Output is correct
71	Correct	26 ms	17388 KB	Output is correct
72	Correct	24 ms	17388 KB	Output is correct
73	Correct	29 ms	17388 KB	Output is correct
74	Correct	162 ms	34776 KB	Output is correct
75	Correct	160 ms	34780 KB	Output is correct
76	Correct	158 ms	30572 KB	Output is correct
77	Correct	153 ms	30572 KB	Output is correct
78	Correct	166 ms	30572 KB	Output is correct
79	Correct	164 ms	30572 KB	Output is correct
80	Correct	141 ms	34780 KB	Output is correct
81	Correct	155 ms	32864 KB	Output is correct
82	Correct	155 ms	32736 KB	Output is correct
83	Correct	172 ms	31208 KB	Output is correct
84	Correct	177 ms	31272 KB	Output is correct
85	Correct	179 ms	30824 KB	Output is correct
86	Correct	178 ms	30588 KB	Output is correct
87	Correct	158 ms	32736 KB	Output is correct
88	Correct	160 ms	32736 KB	Output is correct
89	Correct	168 ms	31716 KB	Output is correct
90	Correct	175 ms	30568 KB	Output is correct
91	Correct	182 ms	30700 KB	Output is correct
92	Correct	181 ms	30572 KB	Output is correct

Submission #338227

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