Submission #1049644

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1049644	2024-08-09T03:21:48 Z	Gromp15	Ancient Books (IOI17_books)	C++17	22 / 100	2000 ms	378916 KB

books

#include <bits/stdc++.h>
#define ll long long
#include "books.h"
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define ar array
using namespace std;
template<typename T> bool ckmin(T &a, const T &b) { return a > b ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }

struct seg {
	int N; vector<vector<ar<int, 2>>> adj;
	seg(int n) : N(1<<(__lg(n)+1)), adj(2*N) {
		for (int i = 2; i < 2*N; i++) adj[i].push_back({i >> 1, 0});
	}
	void add_edge(int x, int y) {
		adj[x+N].push_back({y+N, 1});
	}
	void add_edge(int node, int nl, int nr, int ql, int qr, int x) { // l and r go to x
		if (ql > nr || qr < nl) return;
		if (ql <= nl && nr <= qr) {
			adj[node].push_back({x + N, 0});
			return;
		}
		int mid = (nl+nr)/2;
		add_edge(node * 2, nl, mid, ql, qr, x);
		add_edge(node * 2 + 1, mid + 1, nr, ql, qr, x);
	}
	void bfs(vector<int>& dist, vector<int> nodes) {
		vector<int> dist2(2 * N, 1e9);
		for (int i = 0; i < sz(dist); i++) dist2[i + N] = dist[i];
		priority_queue<ar<int, 2>, vector<ar<int, 2>>, greater<ar<int, 2>>> q;
		for (int v : nodes) q.push({dist[v], v + N});
		while (q.size()) {
			auto [cost, v] = q.top(); q.pop();
			if (cost != dist2[v]) continue;
			for (auto [u, w] : adj[v]) if (ckmin(dist2[u], cost + w)) q.push({dist2[u], u});
		}
		for (int i = 0; i < sz(dist); i++) dist[i] = dist2[i + N];
	}
};

long long minimum_walk(std::vector<int> p, int s) {
	int n = p.size();
	{
		int l = s, r = s;
		for (int i = s; i >= 0; i--) if (i != p[i]) l = i;
		for (int i = s; i < n; i++) if (i != p[i]) r = i;
		p = vector<int>(p.begin() + l, p.begin() + r + 1);
		n = r - l + 1;
	}
	seg st(n);
	for (int i = 0; i < n; i++) {
		if (i) st.add_edge(i, i-1);
		if (i+1 < n) st.add_edge(i, i+1);
	}
	vector<bool> vis(n);
	ll ans = 0;
	for (int i = 0; i < n; i++) if (!vis[i]) {
		int L = i, R = i, tmp = i;
		vector<int> pth;
		while (!vis[tmp]) { 
			ans += abs(tmp - p[tmp]);
			ckmax(R, tmp), vis[tmp] = 1;
			pth.emplace_back(tmp);
			tmp = p[tmp];
		}
		for (int v : pth) st.add_edge(1, 0, st.N-1, L, R, v);
	}
	vector<int> d1(n, 1e9), d2(n, 1e9);
	d1[0] = 0, d2[n-1] = 0;
	st.bfs(d1, {0});
	st.bfs(d2, {n-1});
	vector<int> d3(n);
	for (int i = 0; i < n; i++) d3[i] = d1[i] + d2[i];
	vector<int> tot(n);
	iota(all(tot), 0);
	st.bfs(d3, tot);
	return ans + 2 * d3[s];
}

Subtask #1
12.0 / 12.0

#	Verdict	Memory	Grader output
1	Correct	348 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	348 KB	Output is correct
5	Correct	348 KB	Output is correct
6	Correct	348 KB	Output is correct
7	Correct	344 KB	Output is correct
8	Correct	348 KB	Output is correct
9	Correct	348 KB	Output is correct
10	Correct	348 KB	Output is correct
11	Correct	348 KB	Output is correct
12	Correct	348 KB	Output is correct
13	Correct	348 KB	Output is correct
14	Correct	348 KB	Output is correct
15	Correct	348 KB	Output is correct
16	Correct	348 KB	Output is correct
17	Correct	348 KB	Output is correct
18	Correct	348 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	1 ms	604 KB	Output is correct
20	Correct	1 ms	604 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	1 ms	604 KB	Output is correct
23	Correct	1 ms	632 KB	Output is correct
24	Correct	1 ms	640 KB	Output is correct
25	Correct	1 ms	604 KB	Output is correct
26	Correct	1 ms	604 KB	Output is correct
27	Correct	1 ms	604 KB	Output is correct
28	Correct	1 ms	604 KB	Output is correct
29	Correct	1 ms	604 KB	Output is correct

Subtask #3
0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	1 ms	604 KB	Output is correct
20	Correct	1 ms	604 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	1 ms	604 KB	Output is correct
23	Correct	1 ms	632 KB	Output is correct
24	Correct	1 ms	640 KB	Output is correct
25	Correct	1 ms	604 KB	Output is correct
26	Correct	1 ms	604 KB	Output is correct
27	Correct	1 ms	604 KB	Output is correct
28	Correct	1 ms	604 KB	Output is correct
29	Correct	1 ms	604 KB	Output is correct
30	Correct	1262 ms	306852 KB	Output is correct
31	Correct	1495 ms	378916 KB	Output is correct
32	Correct	51 ms	8016 KB	Output is correct
33	Correct	663 ms	199428 KB	Output is correct
34	Correct	689 ms	199432 KB	Output is correct
35	Correct	750 ms	207624 KB	Output is correct
36	Correct	898 ms	229540 KB	Output is correct
37	Correct	910 ms	271780 KB	Output is correct
38	Correct	968 ms	294332 KB	Output is correct
39	Correct	907 ms	294912 KB	Output is correct
40	Correct	951 ms	315144 KB	Output is correct
41	Correct	1176 ms	331724 KB	Output is correct
42	Correct	1147 ms	370964 KB	Output is correct
43	Execution timed out	2043 ms	226776 KB	Time limit exceeded
44	Halted	0 ms	0 KB	-

Subtask #4
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	604 KB	Output is correct
2	Correct	1 ms	604 KB	Output is correct
3	Correct	1 ms	604 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	1 ms	604 KB	Output is correct
6	Correct	2 ms	604 KB	Output is correct
7	Correct	1 ms	604 KB	Output is correct
8	Correct	1 ms	604 KB	Output is correct
9	Correct	1 ms	604 KB	Output is correct
10	Incorrect	0 ms	348 KB	3rd lines differ - on the 1st token, expected: '0', found: '1998'
11	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	1 ms	604 KB	Output is correct
20	Correct	1 ms	604 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	1 ms	604 KB	Output is correct
23	Correct	1 ms	632 KB	Output is correct
24	Correct	1 ms	640 KB	Output is correct
25	Correct	1 ms	604 KB	Output is correct
26	Correct	1 ms	604 KB	Output is correct
27	Correct	1 ms	604 KB	Output is correct
28	Correct	1 ms	604 KB	Output is correct
29	Correct	1 ms	604 KB	Output is correct
30	Correct	1262 ms	306852 KB	Output is correct
31	Correct	1495 ms	378916 KB	Output is correct
32	Correct	51 ms	8016 KB	Output is correct
33	Correct	663 ms	199428 KB	Output is correct
34	Correct	689 ms	199432 KB	Output is correct
35	Correct	750 ms	207624 KB	Output is correct
36	Correct	898 ms	229540 KB	Output is correct
37	Correct	910 ms	271780 KB	Output is correct
38	Correct	968 ms	294332 KB	Output is correct
39	Correct	907 ms	294912 KB	Output is correct
40	Correct	951 ms	315144 KB	Output is correct
41	Correct	1176 ms	331724 KB	Output is correct
42	Correct	1147 ms	370964 KB	Output is correct
43	Execution timed out	2043 ms	226776 KB	Time limit exceeded
44	Halted	0 ms	0 KB	-

Submission #1049644

Compilation message

Subtask #1 12.0 / 12.0

Subtask #2 10.0 / 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
10.0 / 10.0

Subtask #3
0 / 28.0

Subtask #4
0 / 20.0

Subtask #5
0 / 30.0