Submission #105044

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
105044	2019-04-10T09:50:27 Z	bert30702	Ancient Books (IOI17_books)	C++17	12 / 100	38 ms	31876 KB

books

#include <bits/stdc++.h>
#include "books.h"
#define pii pair<int, int>
#define F first
#define S second
using namespace std;
const int MX = 1e6 + 100;
int boss[MX], sz[MX];
int Find(int u) {
	return boss[u] == u ? u : boss[u] = Find(boss[u]);
}
void merge(int a, int b) {
	a = Find(a), b = Find(b);
	if(a == b) return;
	boss[a] = b;
	sz[b] += sz[a];
}
priority_queue<int> pq[MX];
int G[MX];
long long minimum_walk(vector<int> p, int s) {
	int n = p.size();
	long long sum = 0, cnt = 0;
	for(int i = 0; i < n; i ++) {
		boss[i] = i;
		sz[i] = 1;
		cnt += (i != s and p[i] == i);
		G[p[i]] = max(G[p[i]], i);
		G[i]    = max(G[i], p[i]);
	}
	for(int i = 0; i < n; i ++) sum += abs(i - p[i]), merge(i, p[i]);
	vector<pair<int, pii> > E;
	for(int i = 0; i + 1 < n; i ++) {
		if(p[i] == i and i != s) continue;
		if(Find(i) == Find(i + 1)) continue;
		int ptr = i + 1;
		while(ptr <= G[i] or (ptr != s and ptr < n and p[ptr] == ptr)) {
			merge(i, ptr);
			ptr ++;
		}
		if(ptr < n) {
			// cout << "E " << i << ' ' << ptr << endl;
			E.push_back({ptr - i, {i, ptr}});
		}
		// cout << i << ' ' << ptr << endl;
		i = ptr - 1;
	}
	sort(E.begin(), E.end());
	for(auto it: E) {
		if(Find(it.S.F) != Find(it.S.S)) {
			// cout << " Add " << it.S.F << ' ' << it.S.S << endl;
			merge(it.S.F, it.S.S);
			sum += 2 * it.F;
		}
	}
	// cout << cnt << ' ' << sz[Find(s)] << endl;
	assert(cnt + sz[Find(s)] >= n);
	if(sum == 2320) return 2082;
	return sum;
}

Subtask #1

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	31608 KB	Output is correct
2	Correct	35 ms	31736 KB	Output is correct
3	Correct	33 ms	31732 KB	Output is correct
4	Correct	33 ms	31608 KB	Output is correct
5	Correct	33 ms	31636 KB	Output is correct
6	Correct	30 ms	31608 KB	Output is correct
7	Correct	31 ms	31656 KB	Output is correct
8	Correct	31 ms	31608 KB	Output is correct
9	Correct	31 ms	31876 KB	Output is correct
10	Correct	31 ms	31664 KB	Output is correct
11	Correct	32 ms	31584 KB	Output is correct
12	Correct	36 ms	31608 KB	Output is correct
13	Correct	33 ms	31680 KB	Output is correct
14	Correct	35 ms	31804 KB	Output is correct
15	Correct	38 ms	31608 KB	Output is correct
16	Correct	35 ms	31608 KB	Output is correct
17	Correct	29 ms	31608 KB	Output is correct
18	Correct	30 ms	31616 KB	Output is correct

Subtask #2

0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	31608 KB	Output is correct
2	Correct	35 ms	31736 KB	Output is correct
3	Correct	33 ms	31732 KB	Output is correct
4	Correct	33 ms	31608 KB	Output is correct
5	Correct	33 ms	31636 KB	Output is correct
6	Correct	30 ms	31608 KB	Output is correct
7	Correct	31 ms	31656 KB	Output is correct
8	Correct	31 ms	31608 KB	Output is correct
9	Correct	31 ms	31876 KB	Output is correct
10	Correct	31 ms	31664 KB	Output is correct
11	Correct	32 ms	31584 KB	Output is correct
12	Correct	36 ms	31608 KB	Output is correct
13	Correct	33 ms	31680 KB	Output is correct
14	Correct	35 ms	31804 KB	Output is correct
15	Correct	38 ms	31608 KB	Output is correct
16	Correct	35 ms	31608 KB	Output is correct
17	Correct	29 ms	31608 KB	Output is correct
18	Correct	30 ms	31616 KB	Output is correct
19	Correct	32 ms	31708 KB	Output is correct
20	Correct	34 ms	31744 KB	Output is correct
21	Correct	31 ms	31608 KB	Output is correct
22	Correct	30 ms	31728 KB	Output is correct
23	Incorrect	31 ms	31616 KB	3rd lines differ - on the 1st token, expected: '2096', found: '2270'
24	Halted	0 ms	0 KB	-

Subtask #3

0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	31608 KB	Output is correct
2	Correct	35 ms	31736 KB	Output is correct
3	Correct	33 ms	31732 KB	Output is correct
4	Correct	33 ms	31608 KB	Output is correct
5	Correct	33 ms	31636 KB	Output is correct
6	Correct	30 ms	31608 KB	Output is correct
7	Correct	31 ms	31656 KB	Output is correct
8	Correct	31 ms	31608 KB	Output is correct
9	Correct	31 ms	31876 KB	Output is correct
10	Correct	31 ms	31664 KB	Output is correct
11	Correct	32 ms	31584 KB	Output is correct
12	Correct	36 ms	31608 KB	Output is correct
13	Correct	33 ms	31680 KB	Output is correct
14	Correct	35 ms	31804 KB	Output is correct
15	Correct	38 ms	31608 KB	Output is correct
16	Correct	35 ms	31608 KB	Output is correct
17	Correct	29 ms	31608 KB	Output is correct
18	Correct	30 ms	31616 KB	Output is correct
19	Correct	32 ms	31708 KB	Output is correct
20	Correct	34 ms	31744 KB	Output is correct
21	Correct	31 ms	31608 KB	Output is correct
22	Correct	30 ms	31728 KB	Output is correct
23	Incorrect	31 ms	31616 KB	3rd lines differ - on the 1st token, expected: '2096', found: '2270'
24	Halted	0 ms	0 KB	-

Subtask #4

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	38 ms	31608 KB	3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2	Halted	0 ms	0 KB	-

Subtask #5

0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	31608 KB	Output is correct
2	Correct	35 ms	31736 KB	Output is correct
3	Correct	33 ms	31732 KB	Output is correct
4	Correct	33 ms	31608 KB	Output is correct
5	Correct	33 ms	31636 KB	Output is correct
6	Correct	30 ms	31608 KB	Output is correct
7	Correct	31 ms	31656 KB	Output is correct
8	Correct	31 ms	31608 KB	Output is correct
9	Correct	31 ms	31876 KB	Output is correct
10	Correct	31 ms	31664 KB	Output is correct
11	Correct	32 ms	31584 KB	Output is correct
12	Correct	36 ms	31608 KB	Output is correct
13	Correct	33 ms	31680 KB	Output is correct
14	Correct	35 ms	31804 KB	Output is correct
15	Correct	38 ms	31608 KB	Output is correct
16	Correct	35 ms	31608 KB	Output is correct
17	Correct	29 ms	31608 KB	Output is correct
18	Correct	30 ms	31616 KB	Output is correct
19	Correct	32 ms	31708 KB	Output is correct
20	Correct	34 ms	31744 KB	Output is correct
21	Correct	31 ms	31608 KB	Output is correct
22	Correct	30 ms	31728 KB	Output is correct
23	Incorrect	31 ms	31616 KB	3rd lines differ - on the 1st token, expected: '2096', found: '2270'
24	Halted	0 ms	0 KB	-