oj.uz

Submission #838310

# Submission time Handle Problem Language Result Execution time Memory
838310 2023-08-26T14:22:52 Z Johann Ancient Books (IOI17_books) C++14
50 / 100
 257 ms 58196 KB 
#include "books.h"
#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef pair<ll, ll> pii;
typedef vector<pii> vpii;
typedef vector<vpii> vvpii;
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()

const ll INF = 1LL << 60;
int N;
ll safecost;
vi vis, P;

struct unionfind
{
	vi arr;
	vpii stuff;
	void init(int size)
	{
		arr.resize(size);
		stuff.resize(size);
		for (int i = 0; i < size; ++i)
			arr[i] = i, stuff[i] = {i, i};
	}
	int find(int i) { return arr[i] = (arr[i] == i) ? i : find(arr[i]); }
	void unite(int a, int b)
	{
		a = find(a), b = find(b);
		stuff[a] = {min(stuff[a].first, stuff[b].first), max(stuff[a].second, stuff[b].second)};
		arr[b] = a;
	}
	pii border(int i) { return stuff[find(i)]; }
};
unionfind uf;

void cycle(int i, int &mini, int &maxi, int cycleCnt)
{
	if (vis[i] != -1)
		return;
	mini = min(mini, i);
	maxi = max(maxi, i);
	vis[i] = cycleCnt;
	safecost += (ll)abs(P[i] - i);
	uf.unite(i, P[i]);
	cycle(P[i], mini, maxi, cycleCnt);
}

vvpii adj;

long long minimum_walk(std::vector<int> p, int s)
{
	N = sz(p);
	P.resize(N);
	for (int i = 0; i < N; ++i)
		P[i] = p[i];
	uf.init(N);

	vis.assign(N, -1);
	ll L = INF, R = -1;
	safecost = 0;
	vpii borders;
	for (int i = 0, mini, maxi; i < N; ++i)
	{
		if (P[i] != i)
			L = min(L, (ll)i), R = max(R, (ll)i);
		if (vis[i] == -1 && P[i] != i)
		{
			mini = maxi = i;
			cycle(i, mini, maxi, sz(borders));
			borders.push_back({mini, maxi});
		}
	}
	if (borders.empty())
		return 0;
	if (s <= L || s >= R)
	{
		if (s >= R)
		{
			s = N - s;
			for (int i = 0, l, r; i < sz(borders); ++i)
			{
				tie(l, r) = borders[i];
				borders[i] = {N - r, N - l};
			}
		}
		sort(all(borders));

		ll pos = s;
		for (pii b : borders)
		{
			safecost += 2 * max(0LL, b.first - pos);
			pos = max(pos, b.second);
		}

		return safecost;
	}

	stack<int> st;
	for (int i = R; i >= L; --i)
	{
		while (!st.empty() && st.top() <= uf.border(i).second)
		{
			int b = st.top();
			if (b != uf.border(b).first)
				uf.unite(i, b);
			st.pop();
		}
		st.push(i);
	}

	ll l = s, r = s;
	ll nl = l, nr = r;
	do
	{
		if (nl >= 0 && (uf.border(nl).first < l || uf.border(nl).second > r))
		{
			safecost += 2 * (l - nl);
			nl = l = min(l, uf.border(nl).first);
			nr = r = max(r, uf.border(nl).second);
		}
		if (nr < N && (uf.border(nr).first < l || uf.border(nr).second > r))
		{
			safecost += 2 * (nr - r);
			nl = l = min(l, uf.border(nr).first);
			nr = r = max(r, uf.border(nr).second);
		}
		--nl, ++nr;
	} while (L < l || r < R);

	return safecost;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 300 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 300 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 257 ms 53980 KB Output is correct
31 Correct 253 ms 53996 KB Output is correct
32 Correct 106 ms 53980 KB Output is correct
33 Correct 115 ms 58192 KB Output is correct
34 Correct 112 ms 58196 KB Output is correct
35 Correct 119 ms 58172 KB Output is correct
36 Correct 135 ms 58184 KB Output is correct
37 Correct 122 ms 54528 KB Output is correct
38 Correct 120 ms 54220 KB Output is correct
39 Correct 119 ms 54124 KB Output is correct
40 Correct 137 ms 53976 KB Output is correct
41 Correct 179 ms 53992 KB Output is correct
42 Correct 180 ms 54092 KB Output is correct
43 Correct 121 ms 58172 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Incorrect 1 ms 340 KB 3rd lines differ - on the 1st token, expected: '22140', found: '22144'
7 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 300 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 257 ms 53980 KB Output is correct
31 Correct 253 ms 53996 KB Output is correct
32 Correct 106 ms 53980 KB Output is correct
33 Correct 115 ms 58192 KB Output is correct
34 Correct 112 ms 58196 KB Output is correct
35 Correct 119 ms 58172 KB Output is correct
36 Correct 135 ms 58184 KB Output is correct
37 Correct 122 ms 54528 KB Output is correct
38 Correct 120 ms 54220 KB Output is correct
39 Correct 119 ms 54124 KB Output is correct
40 Correct 137 ms 53976 KB Output is correct
41 Correct 179 ms 53992 KB Output is correct
42 Correct 180 ms 54092 KB Output is correct
43 Correct 121 ms 58172 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 0 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Incorrect 1 ms 340 KB 3rd lines differ - on the 1st token, expected: '22140', found: '22144'
50 Halted 0 ms 0 KB -