답안 #33945 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
33945	2017-11-05T11:32:54 Z	imeimi2000	고대 책들 (IOI17_books)	C++14	12 / 100	0 ms	21464 KB

books

#include "books.h"
#include <algorithm>

using namespace std;
typedef long long llong;

const int max_n = 1e6;
const int max_cycle = max_n / 2 + 1;
int n;
int cycle[max_cycle + 1];
int cycle_l[max_cycle + 1];
int cycle_r[max_cycle + 1];
int group_par[max_cycle + 1];
int cycle_n = 0;

int uf[max_cycle + 1];
int near[max_cycle + 1];
int go_left[max_cycle + 1];
int go_right[max_cycle + 1];
llong go[max_cycle + 1];

int find(int x) {
	if (uf[x]) uf[x] = find(uf[x]);
	return x;
}

long long minimum_walk(vector<int> p, int s) {
	llong dist1 = 0ll;
	n = p.size();
	for (int i = 0; i < n; ++i) {
		dist1 += abs(p[i] - i);
		if (p[i] != i && cycle[i] == 0) {
			cycle[i] = ++cycle_n;
			cycle_l[cycle[i]] = i;
			cycle_r[cycle[i]] = i;
			int j = p[i];
			while (i != j) {
				cycle[j] = cycle[i];
				cycle_r[cycle[i]] = max(cycle_r[cycle[i]], j);
				j = p[j];
			}
		}
	}
	if (dist1 == 0ll) return 0ll;

	vector<int> st;
	st.push_back(0);
	for (int i = 0; i < n; ++i) {
		if (p[i] != i) {
			if (cycle_l[cycle[i]] == i) st.push_back(cycle[i]);
			else {
				int c = find(cycle[i]);
				while (cycle_l[c] < cycle_l[st.back()]) {
					int x = st.back();
					st.pop_back();
					uf[x] = c;
					cycle_r[c] = max(cycle_r[c], cycle_r[x]);
				}
				if (cycle_r[c] == i) {
					st.pop_back();
					group_par[c] = st.back();
				}
			}
		}
	}

	bool contain = false;
	int right_cycle = 0;
	llong dist2 = 0ll;
	int l = n + 1, r = -1;
	for (int i = 1; i <= cycle_n; ++i) {
		if (group_par[i] != 0) group_par[i] = find(group_par[i]);
		if (find(i) == i) {
			l = min(l, cycle_l[i]);
			r = max(r, cycle_r[i]);
			if (cycle_l[i] < s && s < cycle_r[i]) contain = 1;
			if (right_cycle != 0 && cycle_r[i] < cycle_r[right_cycle]) continue;
			if (right_cycle != 0) dist2 += cycle_l[i] - cycle_r[right_cycle];
			right_cycle = i;
		}
	}

	if (!contain && l <= s && s <= r) return dist1 + dist2 * 2;
	for (int i = 0; i < n; ++i) {
		if (p[i] != i) {
			int c = find(cycle[i]);
			near[c] = i;
			if (group_par[c] != 0 && cycle_l[c] == i)
				go_left[c] = i - near[group_par[c]];
			else if (cycle_r[c] == i)
				near[group_par[c]] = max(near[group_par[c]], i - go_left[c]);
		}
	}
	for (int i = 0; i < n; ++i) {
		if (p[i] != i) {
			int c = find(cycle[i]);
			near[c] = i;
			if (group_par[c] != 0 && cycle_r[c] == i)
				go_right[c] = near[group_par[c]] - i;
			else if (cycle_l[c] == i)
				near[group_par[c]] = min(near[group_par[c]], i + go_right[c]);
		}
	}

	for (int i = 1; i <= cycle_n; ++i)
		go[i] = min(go_left[i], go_right[i]) + go[group_par[i]];

	llong dist3 = 1e18;
	for (int i = 0; i < n; ++i) {
		if (p[i] != i)
			dist3 = min(go[find(cycle[i])] + abs(i - s), dist3);
	}
	return dist1 + (dist2 + dist3) * 2;
}

Subtask #1
12.0 / 12.0

#	결과	메모리	Grader output
1	Correct	21464 KB	Output is correct
2	Correct	21464 KB	Output is correct
3	Correct	21464 KB	Output is correct
4	Correct	21464 KB	Output is correct
5	Correct	21464 KB	Output is correct
6	Correct	21464 KB	Output is correct
7	Correct	21464 KB	Output is correct
8	Correct	21464 KB	Output is correct
9	Correct	21464 KB	Output is correct
10	Correct	21464 KB	Output is correct
11	Correct	21464 KB	Output is correct
12	Correct	21464 KB	Output is correct
13	Correct	21464 KB	Output is correct
14	Correct	21464 KB	Output is correct
15	Correct	21464 KB	Output is correct
16	Correct	21464 KB	Output is correct
17	Correct	21464 KB	Output is correct
18	Correct	21464 KB	Output is correct

Subtask #2
0 / 10.0

#	결과	메모리	Grader output
1	Correct	21464 KB	Output is correct
2	Correct	21464 KB	Output is correct
3	Correct	21464 KB	Output is correct
4	Correct	21464 KB	Output is correct
5	Correct	21464 KB	Output is correct
6	Correct	21464 KB	Output is correct
7	Correct	21464 KB	Output is correct
8	Correct	21464 KB	Output is correct
9	Correct	21464 KB	Output is correct
10	Correct	21464 KB	Output is correct
11	Correct	21464 KB	Output is correct
12	Correct	21464 KB	Output is correct
13	Correct	21464 KB	Output is correct
14	Correct	21464 KB	Output is correct
15	Correct	21464 KB	Output is correct
16	Correct	21464 KB	Output is correct
17	Correct	21464 KB	Output is correct
18	Correct	21464 KB	Output is correct
19	Incorrect	21464 KB	3rd lines differ - on the 1st token, expected: '338572', found: '336580'
20	Halted	0 KB	-

Subtask #3
0 / 28.0

#	결과	메모리	Grader output
1	Correct	21464 KB	Output is correct
2	Correct	21464 KB	Output is correct
3	Correct	21464 KB	Output is correct
4	Correct	21464 KB	Output is correct
5	Correct	21464 KB	Output is correct
6	Correct	21464 KB	Output is correct
7	Correct	21464 KB	Output is correct
8	Correct	21464 KB	Output is correct
9	Correct	21464 KB	Output is correct
10	Correct	21464 KB	Output is correct
11	Correct	21464 KB	Output is correct
12	Correct	21464 KB	Output is correct
13	Correct	21464 KB	Output is correct
14	Correct	21464 KB	Output is correct
15	Correct	21464 KB	Output is correct
16	Correct	21464 KB	Output is correct
17	Correct	21464 KB	Output is correct
18	Correct	21464 KB	Output is correct
19	Incorrect	21464 KB	3rd lines differ - on the 1st token, expected: '338572', found: '336580'
20	Halted	0 KB	-

Subtask #4
0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	0 ms	21464 KB	3rd lines differ - on the 1st token, expected: '3304', found: '1894'
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	결과	메모리	Grader output
1	Correct	21464 KB	Output is correct
2	Correct	21464 KB	Output is correct
3	Correct	21464 KB	Output is correct
4	Correct	21464 KB	Output is correct
5	Correct	21464 KB	Output is correct
6	Correct	21464 KB	Output is correct
7	Correct	21464 KB	Output is correct
8	Correct	21464 KB	Output is correct
9	Correct	21464 KB	Output is correct
10	Correct	21464 KB	Output is correct
11	Correct	21464 KB	Output is correct
12	Correct	21464 KB	Output is correct
13	Correct	21464 KB	Output is correct
14	Correct	21464 KB	Output is correct
15	Correct	21464 KB	Output is correct
16	Correct	21464 KB	Output is correct
17	Correct	21464 KB	Output is correct
18	Correct	21464 KB	Output is correct
19	Incorrect	21464 KB	3rd lines differ - on the 1st token, expected: '338572', found: '336580'
20	Halted	0 KB	-

답안 #33945

Compilation message

Subtask #1 12.0 / 12.0

Subtask #2 0 / 10.0

Subtask #3 0 / 28.0

Subtask #4 0 / 20.0

Subtask #5 0 / 30.0

Subtask #1
12.0 / 12.0

Subtask #2
0 / 10.0

Subtask #3
0 / 28.0

Subtask #4
0 / 20.0

Subtask #5
0 / 30.0