Submission #105263

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
105263	2019-04-11T05:16:21 Z	bert30702	Ancient Books (IOI17_books)	C++17	50 / 100	378 ms	126688 KB

books

#include <bits/stdc++.h>
#define pii pair<int, int>
#define F first
#define S second
#include "books.h"
using namespace std;
const int MX = 1e6 + 100;
pii v[MX];
int mn[MX], mx[MX], tmpn[MX], tmpx[MX];
unordered_map<int, int> dp[MX];
int dfs(int l, int r, int a, int b) {
	if(l == a and r == b) return 0;
	if(dp[l].find(r) != dp[l].end()) return dp[l][r];
	if(l == a) return 2 + dfs(l, v[r + 1].S, a, b);
	if(r == b) return 2 + dfs(v[l - 1].F, r, a, b);
	int l1 = min(v[l - 1].F, l);
	int r1 = max(v[l - 1].S, r);
	int l2 = min(v[r + 1].F, l);
	int r2 = max(v[r + 1].S, r);
	if(r1 > r) return dp[l][r] = 2 + dfs(l1, r1, a, b);
	if(l2 < l) return dp[l][r] = 2 + dfs(l2, r2, a, b);
	return dp[l][r] = 2 + dfs(l1, r1, a, b);
}
long long minimum_walk(vector<int> p, int s) {
	int x = 0, y = p.size() - 1;
	while(x < s and p[x] == x) x ++;
	while(y > s and p[y] == y) y --;
	for(int i = x; i <= y; i ++) mn[i] = mx[i] = i;
	for(int i = x; i <= y; i ++) {
		mn[i] = min(mn[i], p[i]);
		mx[i] = max(mx[i], p[i]);
		mn[p[i]] = min(mn[p[i]], i);
		mx[p[i]] = max(mx[p[i]], i);
	}
	long long sum = 0;
	for(int i = x; i <= y; i ++) sum += abs(p[i] - i);
	auto update = [&] (int p, int a) {
		mn[p] = min(mn[p], mn[a]);
		mx[p] = max(mx[p], mx[a]);	
	};
	{
		memcpy(tmpn, mn, sizeof(mn));
		memcpy(tmpx, mx, sizeof(mx));
		queue<int> a, b;
		for(int i = s - 1; i >= x; i --) a.push(i);
		for(int i = s + 1; i <= y; i ++) b.push(i);
		for(int i = s; i <= y; i ++) {
			while(1) {
					 if(a.size() and a.front() >= mn[i]) update(i, a.front()), a.pop();
				else if(b.size() and b.front() <= mx[i]) update(i, b.front()), b.pop();
				else break;
			}
			v[i] = {mn[i], mx[i]};
			i = mx[i]; 
		}
		memcpy(mn, tmpn, sizeof(mn));
		memcpy(mx, tmpx, sizeof(mx));
	}
	{
		memcpy(tmpn, mn, sizeof(mn));
		memcpy(tmpx, mx, sizeof(mx));
		queue<int> a, b;
		for(int i = s - 1; i >= x; i --) a.push(i);
		for(int i = s + 1; i <= y; i ++) b.push(i);
		for(int i = s; i >= x; i --) {
			while(1) {
					 if(a.size() and a.front() >= mn[i]) update(i, a.front()), a.pop();
				else if(b.size() and b.front() <= mx[i]) update(i, b.front()), b.pop();
				else break;
			}
			v[i] = {mn[i], mx[i]};
			i = mn[i];
		}
		memcpy(mn, tmpn, sizeof(mn));
		memcpy(mx, tmpx, sizeof(mx));
	}
	return sum + dfs(v[s].F, v[s].S, x, y);
}

Subtask #1
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	83 ms	70780 KB	Output is correct
2	Correct	97 ms	70776 KB	Output is correct
3	Correct	82 ms	70904 KB	Output is correct
4	Correct	71 ms	70776 KB	Output is correct
5	Correct	71 ms	70904 KB	Output is correct
6	Correct	80 ms	70776 KB	Output is correct
7	Correct	70 ms	70748 KB	Output is correct
8	Correct	71 ms	70776 KB	Output is correct
9	Correct	78 ms	70776 KB	Output is correct
10	Correct	77 ms	70776 KB	Output is correct
11	Correct	79 ms	70776 KB	Output is correct
12	Correct	73 ms	70904 KB	Output is correct
13	Correct	74 ms	70776 KB	Output is correct
14	Correct	73 ms	70776 KB	Output is correct
15	Correct	70 ms	70776 KB	Output is correct
16	Correct	82 ms	70776 KB	Output is correct
17	Correct	87 ms	70780 KB	Output is correct
18	Correct	72 ms	70756 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	83 ms	70780 KB	Output is correct
2	Correct	97 ms	70776 KB	Output is correct
3	Correct	82 ms	70904 KB	Output is correct
4	Correct	71 ms	70776 KB	Output is correct
5	Correct	71 ms	70904 KB	Output is correct
6	Correct	80 ms	70776 KB	Output is correct
7	Correct	70 ms	70748 KB	Output is correct
8	Correct	71 ms	70776 KB	Output is correct
9	Correct	78 ms	70776 KB	Output is correct
10	Correct	77 ms	70776 KB	Output is correct
11	Correct	79 ms	70776 KB	Output is correct
12	Correct	73 ms	70904 KB	Output is correct
13	Correct	74 ms	70776 KB	Output is correct
14	Correct	73 ms	70776 KB	Output is correct
15	Correct	70 ms	70776 KB	Output is correct
16	Correct	82 ms	70776 KB	Output is correct
17	Correct	87 ms	70780 KB	Output is correct
18	Correct	72 ms	70756 KB	Output is correct
19	Correct	74 ms	70776 KB	Output is correct
20	Correct	82 ms	70956 KB	Output is correct
21	Correct	83 ms	70952 KB	Output is correct
22	Correct	84 ms	70776 KB	Output is correct
23	Correct	84 ms	70880 KB	Output is correct
24	Correct	79 ms	70864 KB	Output is correct
25	Correct	75 ms	70776 KB	Output is correct
26	Correct	79 ms	70904 KB	Output is correct
27	Correct	88 ms	70780 KB	Output is correct
28	Correct	81 ms	70836 KB	Output is correct
29	Correct	77 ms	70776 KB	Output is correct

Subtask #3
28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	83 ms	70780 KB	Output is correct
2	Correct	97 ms	70776 KB	Output is correct
3	Correct	82 ms	70904 KB	Output is correct
4	Correct	71 ms	70776 KB	Output is correct
5	Correct	71 ms	70904 KB	Output is correct
6	Correct	80 ms	70776 KB	Output is correct
7	Correct	70 ms	70748 KB	Output is correct
8	Correct	71 ms	70776 KB	Output is correct
9	Correct	78 ms	70776 KB	Output is correct
10	Correct	77 ms	70776 KB	Output is correct
11	Correct	79 ms	70776 KB	Output is correct
12	Correct	73 ms	70904 KB	Output is correct
13	Correct	74 ms	70776 KB	Output is correct
14	Correct	73 ms	70776 KB	Output is correct
15	Correct	70 ms	70776 KB	Output is correct
16	Correct	82 ms	70776 KB	Output is correct
17	Correct	87 ms	70780 KB	Output is correct
18	Correct	72 ms	70756 KB	Output is correct
19	Correct	74 ms	70776 KB	Output is correct
20	Correct	82 ms	70956 KB	Output is correct
21	Correct	83 ms	70952 KB	Output is correct
22	Correct	84 ms	70776 KB	Output is correct
23	Correct	84 ms	70880 KB	Output is correct
24	Correct	79 ms	70864 KB	Output is correct
25	Correct	75 ms	70776 KB	Output is correct
26	Correct	79 ms	70904 KB	Output is correct
27	Correct	88 ms	70780 KB	Output is correct
28	Correct	81 ms	70836 KB	Output is correct
29	Correct	77 ms	70776 KB	Output is correct
30	Correct	309 ms	82796 KB	Output is correct
31	Correct	291 ms	82772 KB	Output is correct
32	Correct	203 ms	78584 KB	Output is correct
33	Correct	378 ms	126688 KB	Output is correct
34	Correct	323 ms	126644 KB	Output is correct
35	Correct	303 ms	115248 KB	Output is correct
36	Correct	344 ms	95080 KB	Output is correct
37	Correct	286 ms	90232 KB	Output is correct
38	Correct	248 ms	85880 KB	Output is correct
39	Correct	267 ms	85396 KB	Output is correct
40	Correct	261 ms	83064 KB	Output is correct
41	Correct	262 ms	82808 KB	Output is correct
42	Correct	257 ms	82808 KB	Output is correct
43	Correct	231 ms	82780 KB	Output is correct

Subtask #4
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	72 ms	70776 KB	Output is correct
2	Correct	75 ms	70776 KB	Output is correct
3	Correct	75 ms	70904 KB	Output is correct
4	Correct	79 ms	70904 KB	Output is correct
5	Correct	74 ms	70936 KB	Output is correct
6	Correct	82 ms	70776 KB	Output is correct
7	Correct	79 ms	70776 KB	Output is correct
8	Incorrect	71 ms	70776 KB	3rd lines differ - on the 1st token, expected: '10478', found: '10490'
9	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	83 ms	70780 KB	Output is correct
2	Correct	97 ms	70776 KB	Output is correct
3	Correct	82 ms	70904 KB	Output is correct
4	Correct	71 ms	70776 KB	Output is correct
5	Correct	71 ms	70904 KB	Output is correct
6	Correct	80 ms	70776 KB	Output is correct
7	Correct	70 ms	70748 KB	Output is correct
8	Correct	71 ms	70776 KB	Output is correct
9	Correct	78 ms	70776 KB	Output is correct
10	Correct	77 ms	70776 KB	Output is correct
11	Correct	79 ms	70776 KB	Output is correct
12	Correct	73 ms	70904 KB	Output is correct
13	Correct	74 ms	70776 KB	Output is correct
14	Correct	73 ms	70776 KB	Output is correct
15	Correct	70 ms	70776 KB	Output is correct
16	Correct	82 ms	70776 KB	Output is correct
17	Correct	87 ms	70780 KB	Output is correct
18	Correct	72 ms	70756 KB	Output is correct
19	Correct	74 ms	70776 KB	Output is correct
20	Correct	82 ms	70956 KB	Output is correct
21	Correct	83 ms	70952 KB	Output is correct
22	Correct	84 ms	70776 KB	Output is correct
23	Correct	84 ms	70880 KB	Output is correct
24	Correct	79 ms	70864 KB	Output is correct
25	Correct	75 ms	70776 KB	Output is correct
26	Correct	79 ms	70904 KB	Output is correct
27	Correct	88 ms	70780 KB	Output is correct
28	Correct	81 ms	70836 KB	Output is correct
29	Correct	77 ms	70776 KB	Output is correct
30	Correct	309 ms	82796 KB	Output is correct
31	Correct	291 ms	82772 KB	Output is correct
32	Correct	203 ms	78584 KB	Output is correct
33	Correct	378 ms	126688 KB	Output is correct
34	Correct	323 ms	126644 KB	Output is correct
35	Correct	303 ms	115248 KB	Output is correct
36	Correct	344 ms	95080 KB	Output is correct
37	Correct	286 ms	90232 KB	Output is correct
38	Correct	248 ms	85880 KB	Output is correct
39	Correct	267 ms	85396 KB	Output is correct
40	Correct	261 ms	83064 KB	Output is correct
41	Correct	262 ms	82808 KB	Output is correct
42	Correct	257 ms	82808 KB	Output is correct
43	Correct	231 ms	82780 KB	Output is correct
44	Correct	72 ms	70776 KB	Output is correct
45	Correct	75 ms	70776 KB	Output is correct
46	Correct	75 ms	70904 KB	Output is correct
47	Correct	79 ms	70904 KB	Output is correct
48	Correct	74 ms	70936 KB	Output is correct
49	Correct	82 ms	70776 KB	Output is correct
50	Correct	79 ms	70776 KB	Output is correct
51	Incorrect	71 ms	70776 KB	3rd lines differ - on the 1st token, expected: '10478', found: '10490'
52	Halted	0 ms	0 KB	-

Submission #105263

Compilation message

Subtask #1 12.0 / 12.0

Subtask #2 10.0 / 10.0

Subtask #3 28.0 / 28.0

Subtask #4 0 / 20.0

Subtask #5 0 / 30.0

Subtask #1
12.0 / 12.0

Subtask #2
10.0 / 10.0

Subtask #3
28.0 / 28.0

Subtask #4
0 / 20.0

Subtask #5
0 / 30.0