oj.uz

Submission #782503

# Submission time Handle Problem Language Result Execution time Memory
782503 2023-07-14T03:18:04 Z GusterGoose27 Ancient Books (IOI17_books) C++17
100 / 100
 278 ms 72484 KB 
#include "books.h"

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1e6+5;

typedef long long ll;
typedef pair<int, int> pii;
bool vis[MAXN];
int uf[MAXN];
vector<int> cont[MAXN];
// pii range[MAXN];
// vector<int> in_comp[MAXN];
int par[MAXN];
int dist[MAXN];

int n;

int _abs(int v) {
	return v < 0 ? -v : v;
}

int find(int i) {
	return uf[i] == i ? i : uf[i] = find(uf[i]);
}

void merge(int i, int j) {
	i = find(i);
	j = find(j);
	if (i == j) return;
	// assert(i != j);
	if (cont[i].size() < cont[j].size()) swap(i, j);
	for (int v: cont[j]) {
		cont[i].push_back(v);
		uf[v] = i;
	}
	cont[j].clear();
	uf[j] = i;
	// range[i].first = min(range[i].first, range[j].first);
	// range[i].second = max(range[i].second, range[j].second);
}

void upd(int cur, queue<int> &q) {
	int cdist = 1+dist[find(cur)];
	if (cur && dist[find(cur-1)] > cdist) {
		assert(dist[find(cur-1)] == MAXN);
		dist[find(cur-1)] = cdist;
		q.push(find(cur-1));
	}
	if (cur < n-1 && dist[find(cur+1)] > cdist) {
		assert(dist[find(cur+1)] == MAXN);
		dist[find(cur+1)] = cdist;
		q.push(find(cur+1));
	}
}

ll minimum_walk(vector<int> p, int s) {
	ll ans = 0;
	n = p.size();
	for (int i = 0; i < n; i++) ans += _abs(p[i]-i);
	if (ans == 0) return 0;
	vector<pii> intervals;
	for (int i = 0; i < n; i++) {
		if (vis[i]) continue;
		int cur = i;
		int l = i, r = i;
		do {
			l = min(l, cur);
			r = max(r, cur);
			uf[cur] = i;
			cont[i].push_back(cur);
			vis[cur] = 1;
			cur = p[cur];
		} while (cur != i);
		if (l == r && i == s) intervals.push_back(pii(l, r));
		sort(cont[i].begin(), cont[i].end());
		if (r > l) {
			for (int j = 0; j < cont[i].size()-1; j++) intervals.push_back(pii(cont[i][j], cont[i][j+1]));
		}
		// range[i] = pii(l, r);
	}
	sort(intervals.begin(), intervals.end()); // they are probably already sorted
	fill(dist, dist+n, MAXN);
	int curr = intervals[0].second;
	vector<int> stck;
	for (int i = 0; i < intervals.size(); i++) {
		while (!stck.empty() && stck.back() < intervals[i].first) {
			int v = stck.back(); stck.pop_back();
			if (stck.empty()) dist[find(v)] = 0;
			// else par[find(v)] = find(stck.back());
		}
		while (!stck.empty() && stck.back() <= intervals[i].second) {
			int v = stck.back(); stck.pop_back();
			merge(v, intervals[i].second);
		}
		stck.push_back(intervals[i].second);
		// assert(curr != intervals[i].first);
		if (curr > intervals[i].first) {
			curr = max(curr, intervals[i].second);
			continue;
		}
		ans += 2*(intervals[i].first-curr);
		curr = intervals[i].second;
	}
	// for (int i = 1; i < stck.size(); i++) par[find(stck[i])] = find(stck[i-1]);
	dist[find(stck[0])] = 0;
	queue<int> q;
	for (int i = 0; i < n; i++) {
		if (dist[i] == 0) dist[find(i)] = 0;
	}
	for (int i = 0; i < n; i++) {
		if (i == find(i) && dist[i] == 0) q.push(i);
	}
	while (!q.empty()) {
		int v = q.front(); q.pop();
		for (int e: cont[v]) upd(e, q);
	}
	// return 0;
	// int dist = 0;
	// s = find(s);
	// while (par[s] != -1) {
	// 	int nxt = find(par[s]);
	// 	dist += min(range[nxt].second-range[s].second, range[s].first-range[nxt].first);
	// 	s = nxt;
	// }
	return ans+2*dist[find(s)];
}

Compilation message

books.cpp: In function 'll minimum_walk(std::vector<int>, int)':
books.cpp:80:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |    for (int j = 0; j < cont[i].size()-1; j++) intervals.push_back(pii(cont[i][j], cont[i][j+1]));
      |                    ~~^~~~~~~~~~~~~~~~~~
books.cpp:88:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |  for (int i = 0; i < intervals.size(); i++) {
      |                  ~~^~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23788 KB Output is correct
3 Correct 16 ms 23732 KB Output is correct
4 Correct 12 ms 23700 KB Output is correct
5 Correct 12 ms 23800 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 12 ms 23800 KB Output is correct
9 Correct 12 ms 23688 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23764 KB Output is correct
12 Correct 11 ms 23764 KB Output is correct
13 Correct 12 ms 23892 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 12 ms 23732 KB Output is correct
16 Correct 12 ms 23700 KB Output is correct
17 Correct 12 ms 23700 KB Output is correct
18 Correct 12 ms 23752 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23788 KB Output is correct
3 Correct 16 ms 23732 KB Output is correct
4 Correct 12 ms 23700 KB Output is correct
5 Correct 12 ms 23800 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 12 ms 23800 KB Output is correct
9 Correct 12 ms 23688 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23764 KB Output is correct
12 Correct 11 ms 23764 KB Output is correct
13 Correct 12 ms 23892 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 12 ms 23732 KB Output is correct
16 Correct 12 ms 23700 KB Output is correct
17 Correct 12 ms 23700 KB Output is correct
18 Correct 12 ms 23752 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23836 KB Output is correct
21 Correct 11 ms 23704 KB Output is correct
22 Correct 12 ms 23796 KB Output is correct
23 Correct 12 ms 23792 KB Output is correct
24 Correct 12 ms 23764 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct
26 Correct 12 ms 23800 KB Output is correct
27 Correct 11 ms 23836 KB Output is correct
28 Correct 11 ms 23828 KB Output is correct
29 Correct 12 ms 23840 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23788 KB Output is correct
3 Correct 16 ms 23732 KB Output is correct
4 Correct 12 ms 23700 KB Output is correct
5 Correct 12 ms 23800 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 12 ms 23800 KB Output is correct
9 Correct 12 ms 23688 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23764 KB Output is correct
12 Correct 11 ms 23764 KB Output is correct
13 Correct 12 ms 23892 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 12 ms 23732 KB Output is correct
16 Correct 12 ms 23700 KB Output is correct
17 Correct 12 ms 23700 KB Output is correct
18 Correct 12 ms 23752 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23836 KB Output is correct
21 Correct 11 ms 23704 KB Output is correct
22 Correct 12 ms 23796 KB Output is correct
23 Correct 12 ms 23792 KB Output is correct
24 Correct 12 ms 23764 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct
26 Correct 12 ms 23800 KB Output is correct
27 Correct 11 ms 23836 KB Output is correct
28 Correct 11 ms 23828 KB Output is correct
29 Correct 12 ms 23840 KB Output is correct
30 Correct 278 ms 54048 KB Output is correct
31 Correct 259 ms 55572 KB Output is correct
32 Correct 88 ms 31620 KB Output is correct
33 Correct 193 ms 65952 KB Output is correct
34 Correct 197 ms 65952 KB Output is correct
35 Correct 192 ms 63388 KB Output is correct
36 Correct 200 ms 59032 KB Output is correct
37 Correct 200 ms 56468 KB Output is correct
38 Correct 208 ms 55960 KB Output is correct
39 Correct 216 ms 55840 KB Output is correct
40 Correct 226 ms 55340 KB Output is correct
41 Correct 278 ms 53604 KB Output is correct
42 Correct 240 ms 55852 KB Output is correct
43 Correct 258 ms 65760 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23736 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23764 KB Output is correct
4 Correct 15 ms 23724 KB Output is correct
5 Correct 13 ms 23844 KB Output is correct
6 Correct 14 ms 23840 KB Output is correct
7 Correct 12 ms 23760 KB Output is correct
8 Correct 13 ms 23844 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 12 ms 23764 KB Output is correct
12 Correct 12 ms 23764 KB Output is correct
13 Correct 12 ms 23764 KB Output is correct
14 Correct 13 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 12 ms 23832 KB Output is correct
17 Correct 11 ms 23764 KB Output is correct
18 Correct 12 ms 23764 KB Output is correct
19 Correct 12 ms 23764 KB Output is correct
20 Correct 12 ms 23756 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23788 KB Output is correct
3 Correct 16 ms 23732 KB Output is correct
4 Correct 12 ms 23700 KB Output is correct
5 Correct 12 ms 23800 KB Output is correct
6 Correct 12 ms 23764 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 12 ms 23800 KB Output is correct
9 Correct 12 ms 23688 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23764 KB Output is correct
12 Correct 11 ms 23764 KB Output is correct
13 Correct 12 ms 23892 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 12 ms 23732 KB Output is correct
16 Correct 12 ms 23700 KB Output is correct
17 Correct 12 ms 23700 KB Output is correct
18 Correct 12 ms 23752 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23836 KB Output is correct
21 Correct 11 ms 23704 KB Output is correct
22 Correct 12 ms 23796 KB Output is correct
23 Correct 12 ms 23792 KB Output is correct
24 Correct 12 ms 23764 KB Output is correct
25 Correct 12 ms 23764 KB Output is correct
26 Correct 12 ms 23800 KB Output is correct
27 Correct 11 ms 23836 KB Output is correct
28 Correct 11 ms 23828 KB Output is correct
29 Correct 12 ms 23840 KB Output is correct
30 Correct 278 ms 54048 KB Output is correct
31 Correct 259 ms 55572 KB Output is correct
32 Correct 88 ms 31620 KB Output is correct
33 Correct 193 ms 65952 KB Output is correct
34 Correct 197 ms 65952 KB Output is correct
35 Correct 192 ms 63388 KB Output is correct
36 Correct 200 ms 59032 KB Output is correct
37 Correct 200 ms 56468 KB Output is correct
38 Correct 208 ms 55960 KB Output is correct
39 Correct 216 ms 55840 KB Output is correct
40 Correct 226 ms 55340 KB Output is correct
41 Correct 278 ms 53604 KB Output is correct
42 Correct 240 ms 55852 KB Output is correct
43 Correct 258 ms 65760 KB Output is correct
44 Correct 12 ms 23736 KB Output is correct
45 Correct 12 ms 23764 KB Output is correct
46 Correct 12 ms 23764 KB Output is correct
47 Correct 15 ms 23724 KB Output is correct
48 Correct 13 ms 23844 KB Output is correct
49 Correct 14 ms 23840 KB Output is correct
50 Correct 12 ms 23760 KB Output is correct
51 Correct 13 ms 23844 KB Output is correct
52 Correct 12 ms 23764 KB Output is correct
53 Correct 12 ms 23764 KB Output is correct
54 Correct 12 ms 23764 KB Output is correct
55 Correct 12 ms 23764 KB Output is correct
56 Correct 12 ms 23764 KB Output is correct
57 Correct 13 ms 23764 KB Output is correct
58 Correct 11 ms 23764 KB Output is correct
59 Correct 12 ms 23832 KB Output is correct
60 Correct 11 ms 23764 KB Output is correct
61 Correct 12 ms 23764 KB Output is correct
62 Correct 12 ms 23764 KB Output is correct
63 Correct 12 ms 23756 KB Output is correct
64 Correct 210 ms 66424 KB Output is correct
65 Correct 216 ms 70272 KB Output is correct
66 Correct 204 ms 58672 KB Output is correct
67 Correct 231 ms 58168 KB Output is correct
68 Correct 31 ms 27832 KB Output is correct
69 Correct 38 ms 27696 KB Output is correct
70 Correct 32 ms 27980 KB Output is correct
71 Correct 31 ms 28476 KB Output is correct
72 Correct 28 ms 28804 KB Output is correct
73 Correct 32 ms 27476 KB Output is correct
74 Correct 198 ms 68676 KB Output is correct
75 Correct 197 ms 68804 KB Output is correct
76 Correct 270 ms 68436 KB Output is correct
77 Correct 273 ms 68556 KB Output is correct
78 Correct 223 ms 66080 KB Output is correct
79 Correct 225 ms 65984 KB Output is correct
80 Correct 95 ms 34276 KB Output is correct
81 Correct 156 ms 66096 KB Output is correct
82 Correct 154 ms 66156 KB Output is correct
83 Correct 201 ms 62500 KB Output is correct
84 Correct 206 ms 62904 KB Output is correct
85 Correct 199 ms 59628 KB Output is correct
86 Correct 205 ms 60016 KB Output is correct
87 Correct 161 ms 72484 KB Output is correct
88 Correct 177 ms 68404 KB Output is correct
89 Correct 194 ms 63212 KB Output is correct
90 Correct 198 ms 61220 KB Output is correct
91 Correct 200 ms 57768 KB Output is correct
92 Correct 227 ms 59608 KB Output is correct